Schaeffler Product catalogue - medias
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Radial insert ball bearings
 

Radial insert ball bearings are ready-to-fit machine elements. In combination with drawn shafts, they are particularly easy to fit and suitable for the design of economical bearing arrangements. They are highly suitable where predominantly radial loads must be supported.

 
 

Radial insert ball bearings with an extended inner ring undergo less tilting
Deviation from the normal position due to load or geometrical influence

See Misalignment error
and therefore run more smoothly.

 
 

Radial insert ball bearings with a spherical outer ring are highly suitable where:

 
 
  • static angular misalignments of the shaft must be compensated, which are caused by mounting inaccuracies and tolerances
    See
    Running accuracy
    Dimensional accuracy
    in the adjacent construction ➤ section
  • very good seals
    Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

    See
    Seal
    Operating life
    Friction
    are required in environmental conditions such as dust, contamination, moisture, stone impacts and shocks ➤ section .
 
 

Radial insert ball bearings with a cylindrical outer ring are highly suitable where:

 
 
  • a cylindrical housing
    See Mounting dimenstions
    bore is already present
  • the outer ring of the bearings is to be located by means of easy-to-fit snap rings.
 
 

Radial insert ball bearings with a profiled bore are highly suitable where:

 
 
  • shafts must transmit very high torques.
 
 

Radial insert ball bearings with a rubber interliner
Vibration damping ring e.g. between bearing outer ring and housing.
are highly suitable where:

 
 
  • vibrations and shocks must be supported
  • damping of running noise is required.
 
   

Figure 1
Compensation of static angular misalignments, available seals
Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

See
Seal
Operating life
Friction
with sealing
See Seals
action of different magnitudes

η =  sealing action

 

imageref_22215698443_All.gif

 
 

Bearing design

 

Design variants

 

The radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
have a spherical or cylindrical outside surface. They are predominantly located on the shaft by means of an eccentric locking collar or grub screws.

 
 

The bearings are sealed using a range of available standard seals
Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

See
Seal
Operating life
Friction
that are matched to the different application conditions.

 
 

Radial insert ball bearings are available in the following designs:

 
 
  • standard bearings in accordance with ISO ➤ link
  • corrosion-resistant bearings in a VA design or with a Corrotect coating in accordance with ISO ➤ link
  • Black Series with Durotect BS coating
    Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
    in accordance with JIS B 1558 ➤ link .
 
imageref_18348417035_All.gif   Radial insert ball bearings are also available in many other designs and sizes, as well as for specific applications, by agreement.  
imageref_19964530187_All.gif   Numerous sizes are supplied in X-life premium quality. These products are indicated in the product tables.  
  Radial insert ball bearings of X-life premium quality
See DIN 55 350 part 11 and ISO 8402 for terminology and definitions.
have, for example, a lower roughness Ra and higher geometrical accuracy
Deviation of the actual dimension from the nominal dimension as described by tolerances. For monorail systems, the parallel deviation of the reference surfaces within given tolerances.

See
Running accuracy
Dimensional accuracy
of the raceways than comparable designs that are not X-life. As a result, these bearings have higher load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
carrying capacity and longer rating life
The basic rating life is the life reached or exceeded by 90% of a sufficiently large group of apparently identical bearings before the first evidence of material fatigue develops
although their dimensions are identical. In certain applications, this means that it may be possible to design a smaller bearing arrangement.
 
  Radial insert ball bearings of X-life premium quality
See DIN 55 350 part 11 and ISO 8402 for terminology and definitions.
have an eccentric locking collar of an improved design and the quantity and distribution of the lubricant
Gaseous, fluid, consistent, plastic or solid material for reduction of friction and wear between two friction elements.
has been optimised. Housings ASE have additional crosspieces on the underside. For extreme requirements, the cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
and seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
material in the high and low temperature designs (suffix FA101) has been significantly improved in comparison with earlier versions.
 

Metric and inch size designs

 

Radial insert ball bearings are available in metric sizes. Some series have a bore diameter with inch dimensions.

 
 

Standard bearings in accordance with ISO

 

The radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
are based on the deep groove ball bearing series 60, 62 and 63. The numerals identify the ball set and therefore the load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
carrying capacity of the bearing ➤ section . The inner ring is extended on one or both sides, while the bore has a plus tolerance in most of the designs.

 
 

Radial insert ball bearings are particularly easy to fit and are preferentially suitable for drawn shafts of tolerance classes h6 Ⓔ to h9 Ⓔ. For non-locating bearings, shafts of tolerance classes h5 Ⓔ to h7 Ⓔ are recommended.

 

Spherical outside surface for the compensation of misalignments

 

Radial insert ball bearings with a spherical outside surface are single row, ready-to-fit units comprising a solid outer ring, cages made from plastic or sheet steel and seals P, R, L or T ➤ Table 7. Bearings with an inner ring extended on both sides undergo less tilting
Deviation from the normal position due to load or geometrical influence

See Misalignment error
of the inner ring and therefore run more smoothly.

 
 

In combination with a housing
See Mounting dimenstions
matched to the design, bearings with a spherical outside surface can compensate for misalignment
Deviation of an actual line from a theoretical ideal line, for example a bearing axis from the shaft axis; may be due to machining, flexing of shaft or deformation of housing.
of the shaft ➤ section .

 
 

With only a few exceptions, radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
can be relubricated. For this purpose, they have two lubrication
Feed of fresh lubricant to friction points. Fresh lubricant mixes with used lubricant at the friction point. Lubricant feed is by means of lubrication equipment. The time period for relubrication is shorter than that for the lubricant change interval.

See
Lubrication method
Lubrication condition
Recirculating lubrication
Lubrication technology
One-off lubrication
Hydrodynamic lubrication
Lubricant change intervall
Lubricant change
Lubricant
Lubricant paste
Oil
Grease
Lubrication film
Lubrication system
holes in one plane of the outer ring offset by 180°.

 
 

Location on the shaft is by means of an eccentric locking collar, grub screws in the inner ring, an adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve, a drive slot, fit or profiled bore ➤ Figure 2.

 

Cylindrical outside surface for a cylindrical housing
See Mounting dimenstions
bore

 

Radial insert ball bearings with a cylindrical outside surface are single row, ready-to-fit units comprising a solid outer ring, an inner ring extended on one or both sides, cages made from plastic and seals P or R ➤ Table 7. Bearings with an inner ring extended on both sides undergo less tilting
Deviation from the normal position due to load or geometrical influence

See Misalignment error
of the inner ring and therefore run more smoothly.

 
 

The radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
are greased and cannot be relubricated.

 
 

Their location on the shaft is by means of an eccentric locking collar, fit or profiled bore ➤ link and ➤ link .

 
 

Location and design

Locating bearings

 

Location is by means of eccentric locking collars, grub screws or integrated adapter
An accessory mounted on another element, for example a lubrication adapter
sleeves ➤ Figure 2 and ➤ Figure 3. Certain series can be located by means of a fit on the shaft. The extended inner ring on one or both sides is used as a running surface for the seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
and prevents significant tilting
Deviation from the normal position due to load or geometrical influence

See Misalignment error
of the inner ring.

 

Bearings with vibration damping

 

For applications where strong vibrations can occur, damping
A reduction in the amplitude of an oscillation (DIN 53 513)
can be achieved using radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with a thick-walled rubber interliner ➤ Figure 3.

 

Non-locating bearings

 

Radial insert ball bearings with a drive slot in the inner ring are non-locating bearings that are used for low speeds and loads in order to compensate for elongations of the shaft ➤ Figure 3. The slot allows simple radial location of the bearing on the shaft.

 
 

   

Figure 2
Location methods for radial insert ball bearings

Symbole/00016410_mei_in_0k_0k.gif  Location using eccentric locking collar, bearing with relubrication facility
Symbole/00016411_mei_in_0k_0k.gif  Location using integrated adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve, bearing with relubrication facility
Symbole/00016412_mei_in_0k_0k.gif  Location using grub screws in inner ring, bearing with relubrication facility

 

imageref_22454033547_All.gif

 
   

Figure 3
Design examples of radial insert ball bearings

Symbole/00016410_mei_in_0k_0k.gif  Radial insert ball bearing with rubber interliner
Symbole/00016411_mei_in_0k_0k.gif  Radial insert ball bearing with drive slot (non-locating bearing), with relubrication facility
Symbole/00016412_mei_in_0k_0k.gif  Radial insert ball bearing with aligning ring (for cylindrical housing
See Mounting dimenstions
bore)

 

imageref_22454152203_All.gif

 
 

Radial insert ball bearings with eccentric locking collar

 

These "classic" INA radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
are located on the shaft by means of a locking collar ➤ Figure 4. They are particularly suitable for bearing arrangements with a constant direction of rotation or, under low speed and load, for an alternating direction of rotation.

 
 

The locking collar is preferably tightened in the direction of rotation and secured by means of a grub screw. This location method prevents damage
Loss of essential or required characteristics in equipment, machinery or plant or their component parts.
to the shaft and can be easily loosened again.

 
 

With the exception of a few series, sealed bearings
Rolling bearings with fitted seals for protection against lubricant loss and contamination.
can be relubricated.

 

Corrosion protection

 

The inner rings up to d = 60 mm and the locking collars in general have a Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
and are thus protected against fretting corrosion. This is not valid for the series RALE..-XL-NPP(-B).

 
   

Figure 4
Location by means of eccentric locking collar

GE..-XL-KRR-B

 

imageref_22832408587_All.gif

 
 

Radial insert ball bearings with eccentric locking collar and slots in the outer ring

 

The basic design of series RAE..-XL-NPP-NR is a radial insert ball bearing with an eccentric locking collar and an inner ring extended on one side ➤ Figure 5. The outer ring has a cylindrical outside surface and two slots to DIN 616 and ISO 464. The bearings are fitted in cylindrical bores and axially located by easy-to-fit snap rings. The bearing is supplied with one snap ring to DIN 5417 already fitted.

 
 

The radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
are greased and cannot be relubricated.

 

Corrosion protection

 

Inner rings up to a bore diameter d = 60 mm have a Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
and are thus protected against fretting corrosion.

 
   

Figure 5
Radial insert ball bearing with cylindrical outside surface and two slots in outer ring

RAE..-XL-NPP-NR

 

imageref_9007209621139595_All.gif

 
 

Radial insert ball bearings with grub screws in the inner ring

 

In the case of these radial insert ball bearings, the inner ring is located on the shaft by means of two grub screws offset by 120° ➤ Figure 6. This location method is suitable for bearing arrangements with a constant direction of rotation or, under low speed and load, for an alternating direction of rotation.

 
 

The grub screws are self-retaining and have a fine pitch thread with cup point for secure location of the bearings.

 
 

With the exception of series AY..-XL-NPP-B, the bearings can be relubricated.

 
   

Figure 6
Location by means of grub screws in the inner ring

GYE..-XL-KRR-B

 

imageref_22832412043_All.gif

 
 

Radial insert ball bearings with adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve

 

In the case of this series, the inner ring is located on the shaft by means of an adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve with a locknut and a tab washer ➤ Figure 7. These radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
are suitable for shafts up to tolerance class h11 Ⓔ.

 
 

The bearings can be relubricated.

 

Suitable for very high speeds

 

This location method is suitable for bearing arrangements with a constant or alternating direction of rotation and for high speeds.

 
 

The adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve and locknut give concentric, force locking location of the bearing inner ring on the shaft. As a result, the speeds that can be achieved are approximately the same as with deep groove ball bearings. These bearings also give quieter running than normal radial insert ball bearings. The adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve, locknut and tab washer are all zinc-coated.

 

Reversing operation

 

The bearings are highly suitable for reversing operation. As a result of the force locking connection, there is no occurrence of fretting corrosion
Local corrosion on metallic surface caused by friction or effects of external heat.
between the shaft and the bore of the adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve.

 

Interchangeability

 

Due to the integral adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve, the bearings have the same radial dimensions as, and slightly lower basic load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
ratings than, radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with an eccentric locking collar, or with grub screws in the inner ring, and are interchangeable with these bearings.

 
   

Figure 7
Location using adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve and locknut

GSH..-XL-2RSR-B

 

imageref_22833132299_All.gif

 
 

Radial insert ball bearings with drive slot

Suitable as non-locating bearings for low speeds

 

Radial insert ball bearings with a drive slot in the inner ring are non-locating bearings with good high temperature characteristics ➤ Figure 8. Non-locating bearings are used at low speeds and loads to compensate for elongations of the shaft.

 
 

Due to the slot, they are easy to locate in a radial direction. Rotation is prevented by means of a drive pin on the shaft or a set collar with a pin. The non-locating bearings are suitable for drawn shafts of tolerance classes h5 Ⓔ to h7 Ⓔ.

 
 

The bearings can be relubricated.

 

Corrosion protection

 

Inner rings up to a bore diameter d = 60 mm have a Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
and are thus protected against fretting corrosion.

 
   

Figure 8
Location by means of drive slot

GLE..-XL-KRR-B

 

imageref_22833135755_All.gif

 
 

Self-aligning deep groove ball bearings with bore for fit

 

Self-aligning deep groove ball bearings are available with a cylindrical bore for a fit seat ➤ Figure 9 and with a reamed square or hexagonal bore ➤ Figure 11.

 
 

The outer ring has a spherical outside surface.

 
 

Bearings with a fit seat on the shaft can achieve the same speeds as standard ball bearings. These are suitable for bearing arrangements with an alternating direction of rotation and offer smooth running.

 
   

Figure 9
Self-aligning deep groove ball bearing with fit seat

2..-XL-NPP-B

 

imageref_9007209621475211_All.gif

 
imageref_18350416395_All.gif   For self-aligning deep groove ball bearings with a fit seat, the fit data for ball bearings apply.  
 

Deep groove ball bearings with bore for fit

 

These bearings have a cylindrical outer ring and are fitted in cylindrical bores ➤ Figure 10. The inner ring is extended on both sides and is located on the shaft using a fit. Due to the extended inner ring, additional axial spacer rings are not required.

 
 

The concentric seat allows speeds equivalent to those of standard ball bearings, while the load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
can be either constant or alternating. Smooth running is also achieved.

 
 

The tolerance of the inner ring bore corresponds to tolerance class Normal in accordance with ISO 492.

 
 

The sheet steel washers extended outwards and angled downwards form a large grease
See
Lubricant
Grease cartridge
Fatty acids
reservoir.

 
   

Figure 10
Deep groove ball bearing with extended inner ring and bore for fit

2..-XL-KRR
2..-XL-KRR-AH

 

imageref_9007209621008139_All.gif

 
 

Self-aligning deep groove ball bearings with profiled bore

Transmission of high torques

 

Bearings with a profiled bore are used where shafts must transmit very high torques and this is only possible using square or hexagonal shafts ➤ Figure 11. Rotation is prevented by form fit.

 
 

These bearings have a spherical or cylindrical outer ring and an inner ring that is extended on both sides ➤ Figure 11 and ➤ Figure 12. Shafts of tolerance class h11 Ⓔ are recommended.

 
 

The bearings are greased to their maximum, some designs with a spherical outside surface can also be relubricated.

 

Corrosion protection

 

The bearings have a Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating.

 
   

Figure 11
Self-aligning deep groove ball bearings with profiled bore

Symbole/00016410_mei_in_0k_0k.gif  Square bore
Symbole/00016411_mei_in_0k_0k.gif  Hexagonal bore
VK..-KTT-B
SK..-KRR-B

 

imageref_9007209621004683_All.gif

 
   

Figure 12
Deep groove ball bearings with extended inner ring and profiled bore

Symbole/00016410_mei_in_0k_0k.gif  Hexagonal bore
SK..-KRR
SK..-KTT

 

imageref_9007214745192331_All.gif

 
 

Radial insert ball bearings with rubber interliner

 

Radial insert ball bearings with a rubber interliner
Vibration damping ring e.g. between bearing outer ring and housing.
are located on the shaft using an eccentric locking collar. The outer ring is encased in a thick-walled NBR interliner ➤ Figure 13.

 
   

Figure 13
Radial insert ball bearings with rubber interliner

Symbole/00016410_mei_in_0k_0k.gif  CRB..-XL with locating shoulder
Symbole/00016411_mei_in_0k_0k.gif  RABR(A,B)
Symbole/00016412_mei_in_0k_0k.gif  RCR(A,B)
Symbole/00016413_mei_in_0k_0k.gif  RCSM(A,B)
Structure of bearing designation
Identification of a bearing by letters and numbers, indicating, for example, the series, dimensional series or size code, bore diameter, bearing design and information such as Corrotect plating or length of guideways
➤ Table 22

 

imageref_22443834635_All.gif

 

Damping of running noise

 

The interliner absorbs vibrations and shocks and thus gives damping
A reduction in the amplitude of an oscillation (DIN 53 513)
of running noises.

 

Various types

 

The interliners have a spherical or cylindrical outside surface.

 
 

For roll bearing arrangements, one series has a locating shoulder on the rubber interliner.

 
 

Bearings with rubber interliners cannot be relubricated.

 
 

Note the tube and housing
See Mounting dimenstions
diameters for radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with rubber interliner:

 
 
  • CRB: tube inside diameter D –0,6 to –1,6
  • RABR, RCR, RCSM: housing diameter D –0,25 to –0,35.
 

Corrosion protection

 

The inner ring and locking collar have a Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
and are thus protected against fretting corrosion. This is not valid for series with the radial insert ball bearing RALE..-XL-NPP(-B).

 
 

Radial insert ball bearings with steel aligning ring

 

These bearings are based on radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with an eccentric locking collar or on self-aligning deep groove ball bearings, but additionally have an axially split outer ring as an aligning ring ➤ Figure 14. They are mounted in cylindrical bores and can compensate static misalignments of the shaft up to ±5°.

 
 

In series PE, the inner ring is located on the shaft by means of a locking collar while, in series BE, it is located by a fit.

 
 

Radial insert ball bearings with an aligning ring cannot be relubricated.

 

Suitable for sheet metal constructions

 

Due to the annular slots in the outer ring to DIN 616, they are highly suitable for sheet metal constructions. In this case, they are axially located using snap rings to DIN 5417.

 
imageref_18350416395_All.gif   The fit tolerances
See
Running accuracy
Dimensional accuracy
of the aligning rings are those of the deep groove ball bearings. Select the fit for the shaft and housing
See Mounting dimenstions
such that the outer ring of the radial insert ball bearing can undergo self-alignment.
 

Corrosion protection

 

The aligning ring has a Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
and is thus protected against fretting corrosion. In the case of series PE..-XL, the inner ring and locking collar also have a coating.

 
   

Figure 14
Radial insert ball bearing with steel aligning ring

PE..-XL

 

imageref_9007209622060171_All.gif

 
 

Corrosion-resistant bearings in a VA design or with a Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
in accordance with ISO 

 

The radial insert ball bearings SUB, SUC and SUG, as well as the radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with the suffix FA125, are designed for corrosion-resistant bearing arrangements. They are therefore equally suitable for applications involving humidity, contaminated water, salt spray mist and for cleaning agents. Their classic areas of application include the agricultural, construction and mining sector, conveying equipment, textile, paper and woodworking machinery, as well as machinery for the food and drink industry.

 

Corrosion-resistant VA design or with Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating

 

The bearings are available in a corrosion-resistant VA design or with a Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
thin film coating ➤ Figure 15. They correspond in their design to single row deep groove ball bearings 62, are ready to fit, particularly easy to fit and allow robust, economical bearing arrangements with a long operating life. They are located on the shaft by means of grub screws in the extended inner ring or by means of an eccentric locking collar.

 
 

Operation even under difficult conditions is ensured by seals
Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

See
Seal
Operating life
Friction
and greases
Consistent grease with a mineral oil and/or synthetic oil base with thickener as well as active ingredients or additives. See DIN 51 825 part 1 for demands on greases, grease type K, operating temperature range -20 to 140°C or DIN 51 825 part 2, for grease type KT.
that are matched to the application.

 
   

Figure 15
Corrosion-resistant radial insert ball bearings, with Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
or in VA design

Symbole/00016410_mei_in_0k_0k.gif  SUC (VA design)
Symbole/00016411_mei_in_0k_0k.gif  SUG (VA design)
Symbole/00016412_mei_in_0k_0k.gif  GRAE..-NPP-B-FA125 (with Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating)

 

imageref_22596081547_All.gif

 
 

Radial insert ball bearings in corrosion-resistant VA design

 

In the case of radial insert ball bearings SUB, SUC and SUG, the bearing rings, eccentric locking collar and rolling elements are made from high alloy, corrosion-resistant rolling bearing
Ready-to-fit machine element, often defined in standards, for transmitting movements, loads and tilting moments with a high level of efficiency; rolling bearings consist of rolling elements, cages and raceways on rings, guideways or carriages as well as lubricant and, if necessary, seals and accessories
steel with an increased chromium and molybdenum content, material number 1.4125.

 
 

Sheet steel cages made from corrosion-resistant steel, material number 1.4301, retain and guide the rolling elements.

 

Location by means of corrosion-resistant VA grub screws

 

The inner ring is located axially on the shaft by means of two corrosion-resistant VA grub screws, material number 1.4301, offset by 120°. This location method is suitable for bearing arrangements with a constant direction of rotation or, under low speed and load, for an alternating direction of rotation.

 
 

The grub screws are self-retaining and have a fine pitch thread with cup point for secure location of the bearings when taking account of the stated tightening torques ➤ Table 35.

 

Location using corrosion‑resistant VA eccentric locking collar

 

The bearings are located on the shaft by means of a corrosion-resistant VA locking collar. They are thus particularly suitable for bearing arrangements with a constant direction of rotation or, under low speed and load, for an alternating direction of rotation.

 
 

The locking collar is preferably tightened in the direction of rotation and must be secured by means of a grub screw. This location method prevents damage
Loss of essential or required characteristics in equipment, machinery or plant or their component parts.
to the shaft and can be easily loosened again.

 

Media resistance

 

In the food industry in particular, the resistance of the material in relation to various cleaning agents is of increasing importance ➤ Table 1.

 
   
Table 1
Resistance to media
 

Medium
+ resistant
(+) moderately resistant
(–) barely resistant
– not resistant
Concentration
X5CrNi18-10
(1.4301)
440C
(1.4125)
%
+20 °C
+80 °C
+20 °C
+80 °C
Hydrochloric acid HCl
0,1
+
+
- -
1
(+)
- - -
18
- - - -
Hydrofluoric acid HF
1
- - - -
5
1)
- 1)
-
Sulphuric acid H2SO4
1
+
- - -
10
(+)
- - -
96
+
(+)
- -
Sulphurous acid H2SO3
1
+
+
- -
Nitric acid HNO3
5
+
+
- -
25
+
+
+
(+)
65
+
+
+
(+)
Phosphoric acid H3PO4
1
+
+
+
+
10
+
+
(+)
+
85
+
+
+
-
Formic acid HCOOH
5
+
+
- -
25
+
+
- -
Acetic acid CH3COOH
5
+
+
+
-
25
+
+
+
-
Citric acid
5
+
+
+
+
25
+
+
- -
Chloroacetic acid
5
+
+
(+)
-
Sodium chloride NaCl
10
+
+
(–)
(–)
Sea water
4
+
+
(–)
(–)
Distilled water
- +
+
+
+
Ammonium hydroxide NH4OH
1
+
+
+
+
10
+
+
+
+
Potassium hydroxide solution KOH
0,1
+
+
+
+
1
+
+
+
+
10
+
+
+
+
Sodium hypochlorite solution
1
+1)
+
2)
(–)
Hydrogen peroxide H2O2
5
+
+
+
+

 
 
______
 1    Not tested. Estimate generated from remaining test series.
 
 
 2    Not tested. No estimate possible.
 
 

Radial insert ball bearings with Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating

 

The radial insert ball bearings GRAE..-XL-NPP-B-FA125 and GE..‑XL‑KRR‑B‑FA125 have a Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
thin film coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
on all surfaces.

 
 

Plastic cages made from polyamide PA66 retain and guide the rolling elements.

 

Anti-corrosion coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
system Corrotect

 

The Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
thin film coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
technology is an economical alternative to radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with conventional corrosion
Reaction of a metallic material with its environment.
protection. The thickness of the coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
film is between 2 μm and 5 μm.

 
 

The advantages of the Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
thin film coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
are:

 
 
  • All surfaces
    The effective surface is the surface which separates the object from its surrounding medium.The actual surface is the approximate image from measuring technology of the ideal geometric surface. Note: various measuring processes or measuring conditions (e.g. stylus radius) can give different actual surfaces.The geometric surface is an ideal surface whose nominal form is defined by a drawing or other technical documentation. See DIN 4760 for further details.

    See
    Surface protection
    Surface tension
    are protected against corrosion, including the turned surfaces
    The effective surface is the surface which separates the object from its surrounding medium.The actual surface is the approximate image from measuring technology of the ideal geometric surface. Note: various measuring processes or measuring conditions (e.g. stylus radius) can give different actual surfaces.The geometric surface is an ideal surface whose nominal form is defined by a drawing or other technical documentation. See DIN 4760 for further details.

    See
    Surface protection
    Surface tension
    of chamfers and radii
  • Rust beneath seals
    Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

    See
    Seal
    Operating life
    Friction
    is prevented in the long term
  • Smaller spots that are damaged by the application and are bright as a result remain protected against corrosion
    Reaction of a metallic material with its environment.
    by the cathodic protection
    Coatings and layers on metallic materials to prevent damage from corrosion.
    effect
  • Operating life
    The basic rating life is the life reached or exceeded by 90% of a sufficiently large group of apparently identical bearings before the first evidence of material fatigue develops
    is significantly longer compared to uncoated parts due to the corrosion
    Reaction of a metallic material with its environment.
    protection
  • Uncoated bearings and housings are fully interchangeable with the coated versions of the same design
  • Bearings and housings made from corrosion-resistant rolling bearing
    Ready-to-fit machine element, often defined in standards, for transmitting movements, loads and tilting moments with a high level of efficiency; rolling bearings consist of rolling elements, cages and raceways on rings, guideways or carriages as well as lubricant and, if necessary, seals and accessories
    steel are often no longer required.
 
imageref_17757187211_All.gif   The use of the Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
thin film coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
is not permitted for direct contact with foodstuffs.
 

Media resistance

 

The resistance of the Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
thin film coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
to various media must be taken into consideration ➤ Table 2.

 
   
Table 2
Resistance to media
 

Chemicals
Corrotect coating1)
Neutral, organic fluids
(oil, brake fluid, petrol)
Resistant
Aqueous salt solutions in the neutral range 6 ≦ pH ≧ 8
(table salt NaCl, seawater applications)
Conditionally resistant
Acidic liquids (pH ≦ 6)
Not resistant
Alkaline liquids (pH ≧ 8)
Not resistant
Oxidising substances
(ozone, chlorine, peroxides, hypochlorides)
Not resistant

 
 
______
 1    Valid for Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coatings based on zinc and zinc alloy.
 

Location by means of locking collar

 

The bearings are located on the shaft by a locking collar. They are thus particularly suitable for bearing arrangements with a constant direction of rotation or, under low speed and load, for an alternating direction of rotation.

 
 

The locking collar is preferably tightened in the direction of rotation and must be secured by means of a grub screw. This location method prevents damage
Loss of essential or required characteristics in equipment, machinery or plant or their component parts.
to the shaft and can be easily loosened again.

 
 

Black Series in accordance with JIS B 1558

 

FAG radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with a spherical outer ring are based on single row deep groove ball bearings 62 and are designed in accordance with JIS B 1558. The Black Series radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
are available with two location methods and one type of seal. They can be relubricated and are particularly easy to install.

 
 

The radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
are pregreased and can be relubricated by means of two lubrication
Feed of fresh lubricant to friction points. Fresh lubricant mixes with used lubricant at the friction point. Lubricant feed is by means of lubrication equipment. The time period for relubrication is shorter than that for the lubricant change interval.

See
Lubrication method
Lubrication condition
Recirculating lubrication
Lubrication technology
One-off lubrication
Hydrodynamic lubrication
Lubricant change intervall
Lubricant change
Lubricant
Lubricant paste
Oil
Grease
Lubrication film
Lubrication system
holes in the outer ring.

 

Cages made from plastic

 

The bearings have plastic cages ➤ link and are sealed on both sides by single piece seals RSR with a vulcanised seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lip and an outer flinger shield.

 

Quiet running, low frictional torque

 

The honed raceways of the bearing rings, in conjunction with the high ball grade, ensure quiet running and a reduced frictional torque.

 

Basic corrosion protection
Platings and coatings applied to metallic materials to protect against corrosion
Durotect BS

 

The inner and outer rings as well as the flinger shields are provided with the black Durotect BS coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
in order to offer basic protection
Coatings and layers on metallic materials to prevent damage from corrosion.
against corrosion.

 
 

Adapter sleeves have a Durotect BS or phosphate coating.

 
 

Location on shaft

Location by means of grub screws

 

In the radial insert ball bearings UC, the inner ring is located on the shaft by means of two grub screws offset by 120° ➤ Figure 16. They are suitable for bearing arrangements with a constant direction of rotation or, under low speed and load, for an alternating direction of rotation.

 
 

The grub screws are self-retaining and have a fine pitch thread with cup point for secure location of the bearings. In order to allow better differentiation, the metric grub screws have a Durotect BS coating
Surface technology to improve tribological behaviour, corrosion resistance, e.g. by INA Corrotect and for electrical insulation.
while the inch size grub screws are zinc-coated.

 
   

Figure 16
Location by means of grub screws in the inner ring

UC

 

imageref_22224408459_All.gif

 

Location by means of adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve

 

In the radial insert ball bearings UK, the inner ring is located on the shaft by means of a concentric adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve in accordance with JIS B 1552 ➤ Figure 17. The inner and outer roughness
Regular or irregular repeat deviation from an ideal geometric profile.
of the adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve is Ra 2,5. They are suitable for bearing arrangements with an alternating direction of rotation, even under high speed and load.

 
   

Figure 17
Location by adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve

UK

 

imageref_22224413451_All.gif

 
 

Comparison of radial insert ball bearing series

 

The possible dimensions and features of the standard bearings are presented in the following table ➤ Table 3. The corrosion-resistant radial insert ball bearing range and the radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
in accordance with JIS (Black Series) are summarised separately ➤ Table 4.

 
   
Table 3
Features of radial insert ball bearings, comparison of standard bearing series
 

Series
Shaft diameter
Location
Series
Accessories
Sealing
Compensation of misalignment
Internal clearance
Cage
Series
Grease
Relubrication facility
Temperature1)
Comments
mm
inch
°C
from
to
from
to
Group
from
to
GE..-XL-KLL-B
20
50
- - Eccentric locking collar
GE..-XL-KLL-B
- L
yes
5
Stahl
GE..-XL-KLL-B
L069
yes
–40
+180
-
E..-XL-KLL
20
50
- - Eccentric locking collar
E..-XL-KLL
- L
no
3
PA66
E..-XL-KLL
GA13
no
–20
+1002)
-
GRAE..-XL-NPP-B
12
60
- - Eccentric locking collar
GRAE..-XL-NPP-B
- P
yes
3
PA66
GRAE..-XL-NPP-B
GA13
yes
–20
+1002)
-
GRA..-NPP-B-AS2/V
- - 5/8 1 15/16 GRA..-NPP-B-AS2/V
GRA..-NPP-B-AS2/V
RABRB..-XL-FA106
12
50
- - Eccentric locking collar
RABRB..-XL-FA106
Rubber interliner
P
yes
3
PA66
RABRB..-XL-FA106
GA13
no
–20
+85
-
RABRA..-XL-FA106
30
- - - RABRA..-XL-FA106
RABRA..-XL-FA106
Light series
RAE..-XL-NPP-B
12
50
- - Eccentric locking collar
RAE..-XL-NPP-B
- P
yes
3
PA66
RAE..-XL-NPP-B
GA13
no
–20
+1002)
-
RA..-NPP-B
- - 3/4 1 1/2 RA..-NPP-B
RA..-NPP-B
-
RALE..-XL-NPP-B
20
30
- - RALE..-XL-NPP-B
RALE..-XL-NPP-B
Light series
PE..-XL
20
40
- - PE..-XL
Aligning ring
PE..-XL
Annular slots in aligning ring
RCSMB..-XL-FA106
15
25
- - Eccentric locking collar
RCSMB..-XL-FA106
Rubber interliner
P
no
3
PA66
RCSMB..-XL-FA106
GA13
no
–20
+85
-
RCSMA..-XL-FA106
30
- - - RCSMA..-XL-FA106
RCSMA..-XL-FA106
Light series
RCRA..-XL-FA106
20
- - - RCRA..-XL-FA106
RCRA..-XL-FA106
Light series, mounting chamfer
RCRB..-XL-FA106
20
- - - RCRB..-XL-FA106
RCRB..-XL-FA106
Mounting chamfer
CRB..-XL
20
35
- - CRB..-XL
CRB..-XL
Abutment shoulder
Series
Shaft diameter
Location
Series
Accessories
Sealing
Compensation of misalignment
Internal clearance
Cage
Series
Grease
Relubrication facility
Temperature1)
  Comments
mm
inch
°C
from
to
from
to
Group
from
to
RAE..-XL-NPP
12
60
- - Eccentric locking collar
RAE..-XL-NPP
- P
no
3
PA66
RAE..-XL-NPP
GA13
no
–20
+1002)
-
RALE..-XL-NPP
20
30
- - RALE..-XL-NPP
RALE..-XL-NPP
-
RAE..-XL-NPP-NR
20
40
- - RAE..-XL-NPP-NR
RAE..-XL-NPP-NR
Two slots, one snap ring
RA..-NPP
- - 5/8 1 1/2 RA..-NPP
RA..-NPP
-
RAL..-NPP
- - 3/4 - RAL..-NPP
RAL..-NPP
-
GE..-XL-KRR-B
17
120
- - Eccentric locking collar
GE..-XL-KRR-B
- R
yes
3
PA66
GE..-XL-KRR-B
GA13
yes
–20
+1002)
-
G..-KRR-B-AS2/V
- - 15/16 2 15/16 Eccentric locking collar
G..-KRR-B-AS2/V
- R
yes
3
PA66
G..-KRR-B-AS2/V
GA13
yes
–20
+1002)
-
GE..-XL-KRR-B-2C
25
40
- - GE..-XL-KRR-B-2C
GE..-XL-KRR-B-2C
Flinger shields
GNE..-XL-KRR-B
30
100
- - GNE..-XL-KRR-B
GNE..-XL-KRR-B
Heavy series
E..-XL-KRR-B
25
40
- - Eccentric locking collar
E..-XL-KRR-B
- R
yes
3
PA66
E..-XL-KRR-B
GA13
no
–20
+1002)
-
NE..-XL-KRR-B
50
- - - NE..-XL-KRR-B
NE..-XL-KRR-B
Heavy series
GE..-XL-KRR-B-FA101
20
75
- - Eccentric locking collar
GE..-XL-KRR-B-FA101
- R
yes
5
Stahl
GE..-XL-KRR-B-FA101
L069
yes
–40
+180
PTFE seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lip
GE..-XL-KRR-B-FA164
20
90
- - GE..-XL-KRR-B-FA164
GE..-XL-KRR-B-FA164
GA11
+150
+250
E..-XL-KRR
20
70
- - Eccentric locking collar
E..-XL-KRR
- R
no
3
PA66
E..-XL-KRR
GA13
no
–20
+1002)
-
GE..-XL-KTT-B
20
80
- - Eccentric locking collar
GE..-XL-KTT-B
- T
yes
3
PA66
GE..-XL-KTT-B
GA13
yes
–20
+1002)
-
Series
Shaft diameter
Location
Series
Accessories
Sealing
Compensation of misalignment
Internal clearance
Cage
Series
Grease
Relubrication facility
Temperature1)
  Comments
mm
inch
°C
from
to
from
to
Group
from
to
GAY..-XL-NPP-B
12
60
- - Grub screws
GAY..-XL-NPP-B
- P
yes
3
PA66
GAY..-XL-NPP-B
GA13
yes
–20
+1002)
-
GAY..-NPP-B-AS2/V
- - 5/8 1 7/16 GAY..-NPP-B-AS2/V
GAY..-NPP-B-AS2/V
GYE..-XL-KRR-B
12
90
- - GYE..-XL-KRR-B
GYE..-XL-KRR-B
GY..-KRR-B-AS2/V
- - 1/2 2 15/16 GY..-KRR-B-AS2/V
GY..-KRR-B-AS2/V
AY..-XL-NPP-B
12
30
- - Grub screws
AY..-XL-NPP-B
- P
yes
3
PA66
AY..-XL-NPP-B
GA13
no
–20
+1002)
-
GAY..-XL-NPP-B-FA164
12
15
- - Grub screws
GAY..-XL-NPP-B-FA164
- P
yes
5
Stahl
GAY..-XL-NPP-B-FA164
GA11
yes
+150
+250
PTFE seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lip
GLE..-XL-KRR-B
20
70
- - Drive slot
GLE..-XL-KRR-B
- R
yes
5
Stahl
GLE..-XL-KRR-B
L069
yes
–40
+180
PTFE seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lip
BE..-XL
20
40
- - Fit
BE..-XL
Aligning ring
P
yes
N
PA66
BE..-XL
GA13
no
–20
+1002)
Annular slots in aligning ring
2..-XL-NPP-B
12
50
- - Fit
2..-XL-NPP-B
- R
yes
N
PA66
2..-XL-NPP-B
GA13
no
–20
+1002)
-
2..-XL-KRR(-AH)
13
60
- - 2..-XL-KRR(-AH)
no
2..-XL-KRR(-AH)
SK(E)..-KRR-B
16,1
38,1
- - Hexagonal bore
SK(E)..-KRR-B
- R
yes
3
PA66
SK(E)..-KRR-B
GA13
no
–20
+1002)
Corrosion-resistant, maximum greasing
SK..-KRR
- - 7/8 1 1/4 SK..-KRR
no
SK..-KRR
SK..-KTT-B
- - 7/8 1 1/4 Hexagonal bore
SK..-KTT-B
- T
yes
3
PA66
SK..-KTT-B
L402
no
–20
+1002)
Corrosion-resistant, maximum greasing
SK..-KTT
- - 1 1/4 1 3/4 SK..-KTT
no
SK..-KTT
GA13
GSH..-XL-2RSR-B3)
20
50
- - Adapter sleeve
GSH..-XL-2RSR-B3)
- RSR
yes
4
PA66
GSH..-XL-2RSR-B3)
GA13
yes
–20
+1002)
-
GVK(E)..-KRR-B-AS2/V
16,3
- - - Square bore
GVK(E)..-KRR-B-AS2/V
- R
yes
3
PA66
GVK(E)..-KRR-B-AS2/V
GA13
yes
–20
+1002)
Corrosion-resistant, maximum greasing
VK(E)..-KTT-B
25,4
38
1 - VK(E)..-KTT-B
T
VK(E)..-KTT-B
no
GVK(E)..-KTT-B(-AS2/V)
25,4
39,7
1 1 9/16 GVK(E)..-KTT-B(-AS2/V)
T
GVK(E)..-KTT-B(-AS2/V)
yes


 
 
______
 1    Recommended application temperature. If temperatures exceed +100 °C, relubrication must be carried out regularly.
 
 
 2    Temporary temperature peaks are possible up to 120 °C.
 
 
 3    Pay attention to the interchangeability of the bearing ➤ link
 
   
Table 4
Features of radial insert ball bearings, comparison of series, corrosion‑resistant and Black Series
 

Series
Shaft diameter
Location
Sealing
Compensation of misalignment
Internal clearance
Cage
Grease
Relubrication facility
Temperature1)
Comments
mm
inch
°C
from
to
from
to
from
to
Corrosion-resistant product range

   

   
GRAE..-XL-NPP-B-FA125
20
60
- - Eccentric locking collar
P
yes
Group 3
PA66
GA47
yes
–20
+100
Corrosion-resistant, Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating
GE..-XL-KRR-B-FA125
20
50
- - Eccentric locking collar
R
yes
Group 3
PA66
GA47
yes
–20
+100
Corrosion-resistant, Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating
SUB
20
50
- - Grub screws
RSR
yes
Group 3
Corrosion-resistant VA steel
FM222
yes
–35
+100
Corrosion-resistant, VA design
SUC
12
50
- - Grub screws
RSR
yes
Group 3
Corrosion-resistant VA steel
FM222
yes
–35
+100
Corrosion-resistant, VA design, with flinger shield
SUG
20
50
- - Eccentric locking collar
RSR
yes
Group 3
Corrosion-resistant VA steel
FM222
yes
–35
+100
Corrosion-resistant, VA design
Black Series (radial insert ball bearings in accordance with JIS)

   

   
UC 12
90
1/2
3 1/2
Grub screws
RSR
yes
C3
PA66
GA13
yes
–20
+1002)
Black Series, Durotect BS coating, basic corrosion
Reaction of a metallic material with its environment.
protection
UK 20
80
- - Adapter sleeve to JIS B 1552
RSR
yes
C4
PA66
GA13
yes
–20
+1002)
Black Series, Durotect BS coating, basic corrosion
Reaction of a metallic material with its environment.
protection


 
 
______
 1    Recommended application temperature. If temperatures exceed +100 °C, relubrication must be carried out regularly.
 
 
 2    Temporary temperature peaks are possible up to 120 °C.
 
 

Load carrying capacity

 
 

Radial load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
carrying capacity

Suitable for very high radial loads

 

The balls are in contact with the raceways at one point only. Under purely radial load, the contact points between the rolling elements and raceways lie at the centre of the raceway. As a result, the connection between the contact points passes through the radial plane, i.e. the optimum load direction
Effective direction of a load
is a purely radial load ➤ Figure 2 and ➤ Figure 3. Radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
can therefore support very high radial loads.

 

Larger ball sets permit higher loads

 

The load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
carrying capacity is dependent on the bearing series and the size of the ball set in the reference bearings. As a result, the deep groove ball bearing series 60 with a smaller bearing cross-section cannot support loads as high as those with the standard series 62 of the same dimensions (relative to the bore diameter d) with a larger ball set. The heavy bearing series 63 with the largest ball set is suitable for even higher loads when used for the same bore diameter ➤ Figure 18.

 
   

Figure 18
Reference bearings, comparison of cross-section and load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
carrying capacity for bearings with d = 40 mm

Cr =  basic dynamic load
The term dynamic indicates that the operating condition is with the bearing rotating. This is not a variable load.
rating

 

imageref_21150369803_All.gif

 
 

Axial load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
carrying capacity

Capable of supporting axial loads in both directions

 

Due to the deep raceway grooves in the bearing rings and the narrow osculation
Ratio between raceway radius and ball diameter
between the raceway grooves and balls, radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
can support axial loads in both directions ➤ Figure 2 and ➤ Figure 3. The axial load
Force acting in the direction of the shaft.
carrying capacity is dependent, for example, on the bearing size, the internal construction and the operating clearance. If the axial load
Force acting in the direction of the shaft.
is too high, however, this can increase the running noise and considerably reduce the operating life
See Life, rating
of the bearings.

 
imageref_18348417035_All.gif   If there is any uncertainty regarding the axial load
Force acting in the direction of the shaft.
carrying capacity of the bearings, please consult Schaeffler.
 
 

Compensation of angular misalignments

 
imageref_17757187211_All.gif   The units must not be used to support swivelling or tumbling motion ➤ link .  
 

Compensation of static misalignments

 

Bearings with a spherical outer ring outside surface, fitted in housings with a concave bore, can compensate for static misalignment
Deviation of an actual line from a theoretical ideal line, for example a bearing axis from the shaft axis; may be due to machining, flexing of shaft or deformation of housing.
of the shaft ➤ Figure 19, ➤ Figure 20 and ➤ Figure 21.

 
 

The compensation of misalignments must be within the permissible angle of ±5° for maintenance-free housing
See Mounting dimenstions
units or ±2,5° for housing
See Mounting dimenstions
units with a relubrication facility. The precondition is that the centre axes of the inner rings must lie on a common straight line.

 
 

For units with a lubrication
Feed of fresh lubricant to friction points. Fresh lubricant mixes with used lubricant at the friction point. Lubricant feed is by means of lubrication equipment. The time period for relubrication is shorter than that for the lubricant change interval.

See
Lubrication method
Lubrication condition
Recirculating lubrication
Lubrication technology
One-off lubrication
Hydrodynamic lubrication
Lubricant change intervall
Lubricant change
Lubricant
Lubricant paste
Oil
Grease
Lubrication film
Lubrication system
groove in the housing
See Mounting dimenstions
and lubrication
Feed of fresh lubricant to friction points. Fresh lubricant mixes with used lubricant at the friction point. Lubricant feed is by means of lubrication equipment. The time period for relubrication is shorter than that for the lubricant change interval.

See
Lubrication method
Lubrication condition
Recirculating lubrication
Lubrication technology
One-off lubrication
Hydrodynamic lubrication
Lubricant change intervall
Lubricant change
Lubricant
Lubricant paste
Oil
Grease
Lubrication film
Lubrication system
hole in the radial insert ball bearing, the following applies:

 
 
  • Up to ±2,5°, the units can be relubricated.
  • Between ±2,5° and ±5°, the possibility of relubrication is dependent on the specific unit. Please contact us in this case.
  • Over ±5°, relubrication is no longer possible.
 
   

Figure 19
Compensation of static housing
See Mounting dimenstions
misalignment

±5° for maintenance-free bearings
±2,5° for bearings with relubrication facility

 

imageref_9007206450930315_All.gif

 
   

Figure 20
Compensation of static shaft misalignment

±5° for maintenance-free bearings
±2,5° for bearings with relubrication facility

 

imageref_9007206450933387_All.gif

 
   

Figure 21
Compensation of static shaft misalignment

±5° for maintenance-free bearings

 

imageref_9007205740529291_All.gif

 
 

Radial insert ball bearings are not suitable for continuous oscillating motion of the outer ring in the housing
See Mounting dimenstions
bore

imageref_17757187211_All.gif   Radial insert ball bearings cannot be used if the outer ring undergoes continuous oscillating motions in the housing
See Mounting dimenstions
bore. This is the case if the shaft has an excessively large undersize or the centre axes of the inner rings deviate so much from a common straight line that the tilting
Deviation from the normal position due to load or geometrical influence

See Misalignment error
clearance pres­ent in the bearing is exceeded. In this case, the outer ring is included in the oscillating motion of the bearing occurring with each revolution by the ball set of the inner ring. This situation is shown in the figures for a bent shaft and a roller with journals that are parallel but not in alignment ➤ Figure 22 and ➤ Figure 23. This geometrical defect
Deviation from the ideal geometry
of the machine parts causes tilting
Deviation from the normal position due to load or geometrical influence

See Misalignment error
of the bearing during mounting and continuous oscillating motion of the outer ring during rotation.
 
   

Figure 22
Oscillating motion of outer rings with a bent shaft


 

imageref_9007205740531211_All.gif

 
   

Figure 23
Oscillating motion of outer rings with non-aligned journal


 

imageref_9007205740533131_All.gif

 

An underdimensioned shaft will cause continuous tumbling motions

 

A critical situation also arises with a bearing arrangement
Arrangement of bearings, for example locating/locating, semi-locating/semi-locating, non-locating/non-locating, or semi-locating bearings in tandem, O or X arrangement
of an under­dimensioned shaft ➤ Figure 24. While it is still aligned when free from load, it bends under load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
as shown by the example of a return roller. As a result, the bearings undergo continuous tumbling motion. If circumferential load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
is still present on the outer ring in this case, the deflection
The ability to absorb energy over a certain distance, to store this completely or partially as deformation energy and to release the energy when the load is removed (hysteresis)
of the housing
See Mounting dimenstions
bore is accelerated (leading to wear).

 
   

Figure 24
Oscillating motion of outer rings with a deflected shaft


 

imageref_9007205740535051_All.gif

 
 

Lubrication

 
 

Radial insert ball bearings sealed on both sides are lubricated with a high quality
See DIN 55 350 part 11 and ISO 8402 for terminology and definitions.
lithium soap grease
Lubricating grease based on lithium soap, mineral oil and/or synthetic oil
with a mineral oil
Oil derived from crude oil and prepared for use as a lubricant by distillation and refining. Chemical composition mainly hydrocarbons.
base, which has good anti-corrosion characteristics ➤ Table 5. Bearings with a spherical outside surface can be relubricated, with the exception of a few series (such as AY..-XL-NPP-B).

 
 

Radial insert ball bearings with a cylindrical outside surface have the maximum grease
See
Lubricant
Grease cartridge
Fatty acids
filling. The grease
See
Lubricant
Grease cartridge
Fatty acids
filling is measured so that it is suf­ficient for the entire life
The basic rating life is the life reached or exceeded by 90% of a sufficiently large group of apparently identical bearings before the first evidence of material fatigue develops
of the bearing. As a result, these bearings are generally maintenance-free. Radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
can have sheet steel washers extended outwards and angled downwards, forming a larger grease
See
Lubricant
Grease cartridge
Fatty acids
chamber. Only a few designs with a cylindrical outside surface can be additionally relubricated.

 
 

Radial insert ball bearings with a rubber interliner
Vibration damping ring e.g. between bearing outer ring and housing.
or aligning ring cannot be relubricated.

 
   
Table 5
Recommended greases
Consistent grease with a mineral oil and/or synthetic oil base with thickener as well as active ingredients or additives. See DIN 51 825 part 1 for demands on greases, grease type K, operating temperature range -20 to 140°C or DIN 51 825 part 2, for grease type KT.
for radial insert ball bearings
 

Desig-
nation
Classification
Type of grease
Recommended Arcanol grease
See
Lubricant
Grease cartridge
Fatty acids
for relubrication
GA13
Standard ball bearing and insert bearing grease
for D > 62 mm
Lithium soap
Mineral oil
Multi2
GA22
Free-running grease
with low frictional torque
Lithium soap
Ester oil
-
L069
Radial insert ball bearing grease
for wide temperature range
Polycarbamide
Ester oil
-
GA11
Rolling bearing grease
See
Lubricant
Grease cartridge
Fatty acids
resistant
to media for temperatures
up to +250 °C
PTFE
Alkoxyfluoroether
Temp200
GA47
Rolling bearing grease
See
Lubricant
Grease cartridge
Fatty acids
resistant
to media for temperatures
up to +140 °C
Barium complex soap
Mineral oil
-
L178
Rolling bearing grease
for high speeds
Barium complex soap PAO oil
-
continued ▼

 
 
______
 1    GA stands for Grease Application Group, based on Grease Spec 00.
 
   
Table 6
Recommended greases
Consistent grease with a mineral oil and/or synthetic oil base with thickener as well as active ingredients or additives. See DIN 51 825 part 1 for demands on greases, grease type K, operating temperature range -20 to 140°C or DIN 51 825 part 2, for grease type KT.
for radial insert ball bearings
 

Desig-
nation
Operating temperature range
Upper con-
tinuous limit tem-
perature
ϑupper limit1)
NLGI class 
Speed parameter
n · dM
ISO VG class  (base oil)
°C
°C
min–1 · mm
from
to
from
to
from
to
GA13
–30
+120
+75
3
- 500 000
68
150
GA22
–50
+120
+70
2
- 1 500 000
10
22
L069
–40
+180
+120
2
- 700 000
68
220
GA11
–30
+260
+200
2
- 300 000
460
680
GA47
–20
+130
+70
1
2
350 000
150
320
L178
–20
+142
+75
2
- 800 000
22
46
continued ▲

 
 
______
 1    The upper continuous limit temperature ϑupperlimit must not be exceeded if a temperature-induced reduction in grease
See
Lubricant
Grease cartridge
Fatty acids
operating life
See Life, rating
is to be avoided.
 

Compatibility with plastic cages

 

When using bearings with plastic cages, compatibility between the lubricant
Gaseous, fluid, consistent, plastic or solid material for reduction of friction and wear between two friction elements.
and the cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
material must be ensured if synthetic oils, lubricating greases
Consistent grease with a mineral oil and/or synthetic oil base with thickener as well as active ingredients or additives. See DIN 51 825 part 1 for demands on greases, grease type K, operating temperature range -20 to 140°C or DIN 51 825 part 2, for grease type KT.
with a synthetic oil
Fluid lubricant with a mineral oil and/or synthetic oil base, usually with active ingredients or additives.
base or lubricants containing a high proportion of EP additives are used.

 
 

Radial insert ball bearings in corrosion-resistant VA design

 

Initial greasing is carried out with an aluminium complex soap grease
See
Lubricant
Grease cartridge
Fatty acids
with food applications approval to NSF-H1, which is sufficient in many cases for the operating life
See Life, rating
of the bearings. For relubrication, the outer rings have lubrication
Feed of fresh lubricant to friction points. Fresh lubricant mixes with used lubricant at the friction point. Lubricant feed is by means of lubrication equipment. The time period for relubrication is shorter than that for the lubricant change interval.

See
Lubrication method
Lubrication condition
Recirculating lubrication
Lubrication technology
One-off lubrication
Hydrodynamic lubrication
Lubricant change intervall
Lubricant change
Lubricant
Lubricant paste
Oil
Grease
Lubrication film
Lubrication system
holes on their circumference.

 
 

Black Series

 

The Black Series radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
in accordance with JIS are greased using a grease
See
Lubricant
Grease cartridge
Fatty acids
in Grease Group GA13 ➤ Table 5.

 
 

Sealing

 

Non-contact or contact seals

 

A basic distinction is made between contact and non-contact seals
Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

See
Seal
Operating life
Friction
in the adjacent construction
The immediate environment of the bearing; the bearing and adjacent construction have a reciprocal influence on each other
and the bearing.

 
 

The sealing
See Seals
arrangement has a considerable influence on the operating life
See Life, rating
of a bearing arrangement. Its function is to retain the lubricant
Gaseous, fluid, consistent, plastic or solid material for reduction of friction and wear between two friction elements.
in the bearing and prevent the ingress of contaminants into the bearing.

 
 

Contaminants may have various effects:

 
 
  • A large quantity of very small, abrasive particles causes wear
    Undesirable change to dimensions and/or surfaces of materials due to frictional forces
    in the bearing. The increase in clearance or noise brings the operating life
    See Life, rating
    of the bearing to an end
  • Large, overrolled hard particles reduce the fatigue
    Structural changes, apparent as surface delamination, caused by a large number of overrolling movements under load
    life
    The basic rating life is the life reached or exceeded by 90% of a sufficiently large group of apparently identical bearings before the first evidence of material fatigue develops
    since pittings occur at the indentation points under high bearing loads.
 

Type-specific seals

 

The different designs of seals
Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

See
Seal
Operating life
Friction
are explained below. The type-specific seals
Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

See
Seal
Operating life
Friction
used in the individual radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
are summarised in the table of features ➤ Table 3 and ➤ Table 4.

 
 

Overview of seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
types

 

Seals for radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
are of a three-piece design. This concept offers, due to the rigidly rolled-in inner sheet steel washer, optimum seating in the bearing as well as concentric alignment of the seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lip to the inner ring. The contact seals
Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

See
Seal
Operating life
Friction
on both sides of the bearing give protection
Coatings and layers on metallic materials to prevent damage from corrosion.
against contamination and the loss of lubricant.

 
 

Seals for radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
are available in various designs ➤ Table 7. The stated suffix
Addition to the designation, consisting of letters and/or numbers, for example, it may indicate variants of a series
is included in the ordering designation
Identification of a bearing by letters and numbers, indicating, for example, the series, dimensional series or size code, bore diameter, bearing design and information such as Corrotect plating or length of guideways
and explained in the table of suffixes ➤ section .

 
   
Table 7
Seal types
 

P seal  (NPP)
imageref_9007214931920907_All.gif   Two zinc-coated sheet steel washers (or in a corrosion-
resistant VA design) with intermediate NBR part, seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lip
axially preloaded.
In order to protect the seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lip from mechanical damage,
the outer sheet steel washer extends a considerable distance down towards the bearing inner ring.
For use in narrow radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with inner ring extended on one side.
R seal  (KRR)
imageref_9007214805721867_All.gif   Two zinc-coated sheet steel washers extended outwards and angled downwards with intermediate NBR or PTFE part
and radially preloaded seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lip. Improved protection
Coatings and layers on metallic materials to prevent damage from corrosion.
against mechanical damage.
Substantial grease
See
Lubricant
Grease cartridge
Fatty acids
reservoir due to the sheet steel washers which are extended outwards and angled downwards. Used
in radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with inner ring extended on both sides.
R seal  with flinger shield (KRR-..-2C)
imageref_9007214805724043_All.gif   As R seal, but with outer flinger shield with corrosion
protection.
Additional sealing
See Seals
action without restriction on speed
and with additional protection
Coatings and layers on metallic materials to prevent damage from corrosion.
against mechanical damage.
continued ▼

 
   
Table 8
Seal types
 

T seal  (KTT)
imageref_9007214805726219_All.gif   Two zinc-coated sheet steel washers with intermediate
NBR part and three radially preloaded seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lips for protection
Coatings and layers on metallic materials to prevent damage from corrosion.
against heavy contamination. For better protection
Coatings and layers on metallic materials to prevent damage from corrosion.
of the seal
lip against mechanical damage, the outer sheet steel washer
is extended outwards and angled downwards and outwards.
Lower speeds due to higher friction.
L seal  (labyrinth seal) (KLL)
imageref_9007214948454027_All.gif   Two zinc-coated sheet steel washers extended outwards
in the outer ring with a zinc-coated intermediate sheet steel L‑section ring pressed onto the inner ring.
Substantial grease
See
Lubricant
Grease cartridge
Fatty acids
reservoir due to the sheet steel washers which are extended outwards and angled downwards.
For use in bearings with inner ring extended on both sides.
For increased temperatures and lower friction.
RSR seal  (2RSR)
imageref_9007214948457483_All.gif   Single piece, zinc-coated sheet steel washer with vulcanised and radially preloaded seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lip made from NBR.
Used in radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with integral adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve.
RSR seal  with flinger shield
imageref_9007214931926027_All.gif   Single piece, sheet steel washer in corrosion-resistant
VA design with vulcanised and radially preloaded seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lip
made from NBR and additional flinger shield.
In the Black Series, the flinger shield has a Durotect BS coating.
Sealing cartridge with flinger shield
imageref_9007214812857995_All.gif   Design identical to normal cartridge seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
but supplemented
by a flinger shield to protect the bearing against high pressure cleaning equipment and mechanical damage.
Combined sealing
See Seals
washer and flinger shield with protective shield

imageref_9007214812860171_All.gif   Design identical to normal sealing
See Seals
washer and flinger shield
but supplemented by a protective shield to protect the bearing against high pressure cleaning equipment and mechanical damage.
continued ▲

 
 

BRS seals

 

Bearings with BRS seals can be supplied by agreement ➤ Figure 25.

 

Suitable for very high speeds

 

The friction
The resistance to relative movement of two bodies in contact with each other; subdivided into friction terms, friction types and friction conditions
in this case is as low as that in bearings with sealing
See Seals
shields. They have the advantage over these, however, that the outer rubber-elastic rim gives good sealing
See Seals
when fitted in the slot in the outer ring. This is important in the case of a rotating outer ring, since the base oil
Fluid lubricant with a mineral oil and/or synthetic oil base, usually with active ingredients or additives.
in the grease
See
Lubricant
Grease cartridge
Fatty acids
is separated from the soap suspension by centrifugal force and would escape through the unsealed metallic seat in the outer ring if sealing
See Seals
shields were fitted.

 
   

Figure 25
BRS seals


 

imageref_22948518667_All.gif

 
 

Non-contact seals
Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

See
Seal
Operating life
Friction
in the adjacent construction

 

With non-contact seals, only lubricant
Gaseous, fluid, consistent, plastic or solid material for reduction of friction and wear between two friction elements.
friction
The resistance to relative movement of two bodies in contact with each other; subdivided into friction terms, friction types and friction conditions
occurs in the lubrication
Feed of fresh lubricant to friction points. Fresh lubricant mixes with used lubricant at the friction point. Lubricant feed is by means of lubrication equipment. The time period for relubrication is shorter than that for the lubricant change interval.

See
Lubrication method
Lubrication condition
Recirculating lubrication
Lubrication technology
One-off lubrication
Hydrodynamic lubrication
Lubricant change intervall
Lubricant change
Lubricant
Lubricant paste
Oil
Grease
Lubrication film
Lubrication system
gap. The seals
Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

See
Seal
Operating life
Friction
do not undergo wear
Undesirable change to dimensions and/or surfaces of materials due to frictional forces
and remain capable of operation for a long period. Since they generate no heat, non-contact seals
Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

See
Seal
Operating life
Friction
are also suitable for very high speeds.

 
 

Speeds

 
 

Speed limits for radial insert ball bearings

 

The speed limits are dependent on the load, the clearance between the bearing bore and shaft and the friction
The resistance to relative movement of two bodies in contact with each other; subdivided into friction terms, friction types and friction conditions
of the seals
Elements intended to prevent the ingress of gaseous, fluid and solid materials through the gaps formed by adjacent components whilst stationary or moving.

See
Seal
Operating life
Friction
in the case of bearings with contact seals.

 

Speed limits are guide values

 

Guide values for the permissible speeds can be derived from the diagram ➤ Figure 26.

 
 

In the case of load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
ratios Cr/P > 13, the speeds can be increased. At Cr/P < 5, location by means of a fit is recommended for a shaft roughness
Regular or irregular repeat deviation from an ideal geometric profile.
of Ra 0,3    ➤ link. In order to ensure slippage-free operation, the minimum radial load
A force which acts at an angle of b = 0°.
must be observed ➤ section .

 
   

Figure 26
Permissible speeds for radial insert ball bearings

n =  permissible speed
d =  bore diameter
Cr/P =  load ratio
h5, h6, h9 =  shaft tolerance (subject to envelope requirement Ⓔ)
Symbole/00016410_mei_in_0k_0k.gif  Ball set
Symbole/00016411_mei_in_0k_0k.gif  With d = 12 mm, 15 mm and 17 mm, identical ball set 203
Symbole/00016412_mei_in_0k_0k.gif  For radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with seals L, P or R
Symbole/00016413_mei_in_0k_0k.gif  For radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with seals T

 

imageref_9007214070413195_All.gif

 
imageref_18348417035_All.gif   In the stated applications with load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
ratios Cr/P < 5, please contact us.
 
 

Example of permissible speed calculation

Example of permissible speed calculation

 

Given:

 
 
 
 

 

Shaft tolerance
h6 Ⓔ
Radial insert ball bearing
GRAE30-XL-NPP-B
Ball set
206
Basic dynamic load
The term dynamic indicates that the operating condition is with the bearing rotating. This is not a variable load.
rating Cr

20 700 N
Load P
1 300 N
Sealing
seals P.

 

 
 

Required:

 
 
 
 

 

Load ratio
Cr/P = 20 700 N/1300 N

Cr/P > 13
Permissible speed
n ≈ 4 300 min–1 ➤ Figure 26.

 

 
 

Noise

 
 

Schaeffler Noise Index

 

The Schaeffler Noise Index (SGI) is not yet available for this bearing type    ➤ link. The data for these bearing series will be introduced and updated in stages.

 
 

Temperature range

 
 

The possible operating temperatures of radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
may differ according to the cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
design and the material of the seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lips ➤ Table 9.

 
 

Radial insert ball bearings for a high or expanded temperature range have the suffixes FA164 or FA101 in the designation ➤ Table 3.

 
   
Table 9
Permissible temperature ranges
 

Operating temperature
Radial insert ball bearing
with polyamide cage PA66
with sheet steel cage
with high grade steel cage
with NBR seal
Elements such as axial face seal, labyrinth seal, rotary shaft seal or gap seal which prevent the ingress of gaseous, liquid and solid materials through the gaps between combined components during movement or whilst stationary
lip
with PTFE seal lip and labyrinth seal
with NBR seal lip
°C
°C
°C
FA1013)
FA1644)
from
to
from
to
from
to
from
to
imageref_19988082955_All.gif
   
–20
+1001) 2)
–40
+180
+150
+250
–35
+100

 
 
______
 1    Temporary temperature peaks are possible up to +120 °C.
 
 
 2    In the case of radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
with a rubber interliner, the maximum operating temperature
A measured relubrication interval can be achieved within given limits. The lubricant should be sufficiently thermally stable at the upper operating temperature and should not be too thick at the lower operating temperature.
is reduced to +85 °C.
 
 
 3    High and low temperature design (suffix FA101) ➤ section .
 
 
 4    High temperature design (suffix FA164) ➤ section .
 
 

The operating temperature
A measured relubrication interval can be achieved within given limits. The lubricant should be sufficiently thermally stable at the upper operating temperature and should not be too thick at the lower operating temperature.
of the bearings is limited by:

 
 
  • the dimensional stability of the bearing rings and rolling elements
  • the cage
  • the lubricant
  • the seals.
 
imageref_18348417035_All.gif   In the event of anticipated temperatures which lie outside the stated values, please contact Schaeffler.  
 

Cages

 
 

Rolling bearing cages are subdivided into sheet metal and solid cages.

 
 

Both sheet metal and solid cages for radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
are exclusively ball-guided.

 
 

The most important functions of the cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
are:

 
 
  • to separate the rolling elements from each other, in order to minimise friction
    The resistance to relative movement of two bodies in contact with each other; subdivided into friction terms, friction types and friction conditions
    and heat generation
  • to maintain the rolling elements at the same distance from each other, in order to ensure uniform load
    Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

    See Contact surface
    distribution
  • to guide the rolling elements in the unloaded zone of the bearing.
 
 

Sheet metal cages

 

These cages are predominantly made from steel ➤ Figure 27. In comparison with solid cages made from metal, they are of lower mass.

 
 

Since a sheet metal cage
Metal cage made from, for example, sheet steel or sheet brass.
only fills a small proportion of the gap between the inner and outer ring, lubricant
Gaseous, fluid, consistent, plastic or solid material for reduction of friction and wear between two friction elements.
can easily reach the interior of the bearing and is held on the cage.

 
   

Figure 27
Radial insert ball bearing with sheet metal cages

Symbole/00016410_mei_in_0k_0k.gif  Riveted cage

 

imageref_15106878475_All.gif

 
 

Solid cages made from polyamide PA66

 

Solid cages made from polyamide PA66 are produced using the injection moulding process ➤ Figure 28 and ➤ Figure 29. As a result, cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
types can generally be realised that allow designs with particularly high load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
carrying capacity. The elasticity
Reciprocal of Rigidity
and low mass of polyamide are favourable under shock type bearing loads, high accelerations and decelerations and tilting
Deviation from the normal position due to load or geometrical influence

See Misalignment error
of the bearing rings in relation to each other. Polyamide cages have very good sliding and emergency running characteristics.

 
 

Cages made from glass fibre reinforced polyamide PA66 are suitable for continuous temperatures up to +120 °C. Due to the NBR seal used, the continuous temperature for the radial insert ball bearing is reduced ➤ section .

 
   

Figure 28
Solid polyamide cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
for standard bearings

Symbole/00016410_mei_in_0k_0k.gif  Polyamide cage

 

imageref_22607096715_All.gif

 
   

Figure 29
Solid polyamide cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
for Black Series

Symbole/00016410_mei_in_0k_0k.gif  Polyamide cage

 

imageref_15106887307_All.gif

 
 

Internal clearance

 
imageref_17757187211_All.gif   The differentiation of radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
between the ISO range and JIS range (Black Series) must be taken into consideration for the radial internal clearance.
 
 

Radial internal clearance of radial insert ball bearings

 

The radial internal clearance of most series is Group 3 in accordance with ISO 5753-1 ➤ Table 3 and is thus larger than for normal deep groove ball bearings ➤ Table 10. The radial internal clearance is subdivided into groups in accordance with ISO 5753-1 ➤ Figure 30.

 
 

The larger internal clearance allows better support of misalignments and shaft deflections.

 
   

Figure 30
Radial internal clearance


 

imageref_22224951563_All.gif

 
   
Table 10
Radial internal clearance of radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
(excluding Black Series)
 

Bore
Radial internal clearance
d
mm
Group N
μm
Group 3
μm
Group 4
μm
Group 5
μm
over
incl.
min.
max.
min.
max.
min.
max.
min.
max.
2,5
6
2
13
8
23
- - - -
6
10
2
13
8
23
14
29
20
37
10
18
3
18
11
25
18
33
25
45
18
24
5
20
13
28
20
36
28
48
24
30
5
20
13
28
23
41
30
53
30
40
6
20
15
33
28
46
40
64
40
50
6
23
18
36
30
51
45
73
50
65
8
28
23
43
38
61
55
90
65
80
10
30
25
51
46
71
65
105
80
100
12
36
30
58
53
84
75
120
100
120
15
41
36
66
61
97
90
140
120
140
18
48
41
81
71
114
105
160
140
160
18
53
46
91
81
130
120
180

 
 

Radial internal clearance of Black Series (radial insert ball bearings in accordance with JIS)

 

The radial internal clearance in accordance with JIS B 1520 is C3 for radial insert ball bearings UC and C4 for radial insert ball bearings UK. It is thus larger than in the case of normal deep groove ball bearings ➤ Table 11.

 
 

The larger internal clearance allows better support of misalignments and shaft deflections.

 
   
Table 11
Radial internal clearance of Black Series
 

Bore
Ball set
Outside diameter
Radial internal clearance
d
D
C3
C4
mm
inch
mm
μm
μm
min.
max.
min.
max.
12
- 204
47
13
28
20
36
12,7
1/2
14,288
9/16
15
-
15,875
5/8
17
-
17,462
11/16
19,05
3/4
20
-
20,638
13/16
205
52
13
28
23
41
22,225
7/8
23,812
15/16
25
-
25,4
1
26,988
1 1/16
206
62
28,575
1 1/8
30
-
30,162
1 3/16
31,75
1 1/4
31,75
1 1/4
207
72
15
33
28
46
33,338
1 5/16
34,925
1 3/8
35
-
36,512
1 7/16
38,1
1 1/2
208
80
39,688
1 9/16
40
-
41,275
1 5/8
209
85
18
36
30
51
42,862
1 11/16
44,45
1 3/4
45
-
46,038
1 13/16
210
90
47,625
1 7/8
49,212
1 15/16
50
-
50,8
2
continued ▼

 
   
Table 12
Radial internal clearance of Black Series
 

Bore
Ball set
Outside diameter
Radial internal clearance
d
D
C3
C4
mm
inch
mm
μm
μm
min.
max.
min.
max.
50,8
2
211
100
23
43
38
61
52,388
2 1/16
53,975
2 1/8
55
-
55,562
2 3/16
57,15
2 1/4
212
110
58,738
2 5/16
60
-
60,325
2 3/8
61,912
2 7/16
63,5
2 1/2
213
120
65
-
65,09
2 9/16
66,675
2 5/8
214
125
25
51
46
71
68,262
2 11/16
69,85
2 3/4
70
-
71,438
2 13/16
215
130
73,025
2 7/8
74,612
2 15/16
75
-
76,2
3
77,787
3 1/16
216
140
79,375
3 1/8
80
-
80,962
3 3/16
82,55
3 1/4
217
150
30
58
53
84
84,137
3 5/16
85
-
87,312
3 7/16
88,9
3 1/2
218
160
90
-
93,662
3 11/16
219
170
95
-
100
- 220
180
100,012
3 15/16
101,6
4
continued ▲

 
 

Dimensions, tolerances

 
imageref_17757201419_All.gif   The main dimensions of the standard bearings and corrosion-resistant radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.
correspond to ISO 9628 and DIN 626‑1 ➤ dimension table.
 
  The main dimensions of the Black Series correspond to JIS B 1558 ➤ dimension table.  
imageref_17757201419_All.gif   The limiting dimensions for chamfer dimensions correspond to DIN 620‑6. Overview and limit values   ➤ link.  
   

Figure 31
Symmetrical ring cross-section with identical chamfer dimensions on both rings

d =  inside diameter
r1, r2 =  chamfer dimensions
Symbole/00016410_mei_in_0k_0k.gif  Arc (radius with nominal chamfer dimension) beyond which material must not protrude
Symbole/00016411_mei_in_0k_0k.gif  Radial
Symbole/00016412_mei_in_0k_0k.gif  Axial

 

imageref_9007214361616267_All.gif

 
 

Normal tolerances
See
Running accuracy
Dimensional accuracy
of standard bearings

 

The outside diameter of the bearings corresponds to tolerance class Normal in accordance with ISO 492 ➤ Table 13. The inner ring bore has a plus tolerance to facilitate mounting of the bearing.

 
   
Table 13
Tolerances of radial insert ball bearings
 

Inner ring
Outer ring
Nominal dimension
Bore
d
Deviation

 tΔdmp
Nominal dimension
Outside diameter
D
Deviation1) 2)

 tΔDmp
mm
μm
mm
μm
over
incl.
L
U
over
incl.
U
L
12
18
0
+18
30
50
0
–11
18
24
0
+18
50
80
0
–13
24
30
0
+18
80
120
0
–15
30
40
0
+18
120
150
0
–18
40
50
0
+18
150
180
0
–25
50
60
0
+18
180
250
0
–30
60
90
0
+25
- - - -
90
120
0
+30
- - - -

 
 
______
 1    In the case of sealed bearings, the largest and smallest values of the outside diameter can deviate from the mean value by approximately 0,03 mm.
 
 
 2    Outside diameter tolerances
See
Running accuracy
Dimensional accuracy
also valid for 2..-KRR and 2..-NPP-B.
 
 
Tolerance symbols ➤ Table
U =  upper limit deviation
L =  lower limit deviation
 
 

Standard tolerances
See
Running accuracy
Dimensional accuracy
of corrosion-resistant radial insert ball bearings
Radial ball bearings with extended inner ring and facility for locking on the shaft.

 

The outside diameter of the bearings corresponds to tolerance class Normal in accordance with ISO 492 ➤ Table 14 and ➤ Table 15. The inner ring bore has a plus tolerance to facilitate mounting of the bearing.

 
   
Table 14
Tolerances of radial insert ball bearings, with Corrotect
Thin, galvanic plating containing zinc alloys (binary, ternary) applied to hardened rolling bearing raceways for corrosion protection
coating
 

Inner ring
Outer ring
Nominal dimension
Bore
d
Deviation

 tΔdmp
Nominal dimension
Outside diameter
D
Deviation1)

 tΔDmp
mm
μm
mm
μm
over
incl.
L
U
over
incl.
U
L
12
18
0
+18
30
50
0
–11
18
24
0
+18
50
80
0
–13
24
30
0
+18
80
120
0
–15
30
40
0
+18
120
150
0
–18
40
50
0
+18
150
180
0
–25
50
60
0
+18
180
250
0
–30
60
90
0
+25
- - - -
90
120
0
+30
- - - -

 
 
______
 1    In the case of sealed bearings, the largest and smallest values of the outside diameter can deviate from the mean value by approx. 0,03 mm.
 
 
Tolerance symbols ➤ Table
U =  upper limit deviation
L =  lower limit deviation
 
   
Table 15
Tolerances of radial insert ball bearings, corrosion-resistant VA design
 

Inner ring
Outer ring
Nominal dimension
Bore
d
Deviation

 tΔdmp
Nominal dimension
Outside diameter
D
Deviation1)

 tΔDmp
mm
μm
mm
μm
over
incl.
L
U
over
incl.
U
L
18
24
0
+25
50
80
0
–13
24
30
0
+25
80
120
0
–13
30
40
0
+25
120
150
0
–13
40
50
0
+25
150
180
0
–13
50
60
0
+25
180
250
0
–13

 
 
______
 1    In the case of sealed bearings, the largest and smallest values of the outside diameter can deviate from the mean value by approx. 0,03 mm.
 
 
Tolerance symbols ➤ Table
U =  upper limit deviation
L =  lower limit deviation
 
 

Normal tolerances
See
Running accuracy
Dimensional accuracy
of Black Series (radial insert ball bearings in accordance with JIS)

 

The outside diameter tolerances
See
Running accuracy
Dimensional accuracy
of the bearings correspond to the tolerances
See
Running accuracy
Dimensional accuracy
in accordance with JIS B 1558 ➤ Table 16. The inner ring bore has a plus tolerance to facilitate mounting of the bearing.

 
   
Table 16
Tolerances of inner ring, Black Series
 

Nominal bearing bore diameter
Deviation1)
Width deviation
d
Δdmp
ΔBs
mm
μm
μm
over
incl.
min.
max.
min.
max.
10
18
0
+15
–120
0
18
31,75
0
+18
–120
0
31,75
50,8
0
+21
–120
0
50,8
80,962
0
+24
–150
0
80,962
120
0
+28
–200
0

 
 
______
 1    This corresponds to the arithmetic mean value derived from the largest and smallest diameters (measured using a two-point measuring device).
 
   
Table 17
Tolerances of outer ring, Black Series
 

Nominal outside diameter
Deviation1)
Dsp
ΔDm
mm
μm
over
incl.
min.
max.
30
50
–11
0
50
80
–13
0
80
120
–15
0
120
150
–18
0
150
180
–25
0
180
250
–30
0

 
 
______
 1    In the case of sealed bearings, the largest and smallest values of the outside diameter can deviate from the mean value by approx. 0,03 mm.
 
 

Suffixes

 
 

The suffix
Addition to the designation, consisting of letters and/or numbers, for example, it may indicate variants of a series
defines special designs and features and follows the basic designation
Identification of a bearing by letters and numbers, indicating, for example, the series, dimensional series or size code, bore diameter, bearing design and information such as Corrotect plating or length of guideways
in the ordering designation ➤ Table 18 and ➤ Table 19.

 
   
Table 18
Suffixes and corresponding descriptions
 

Suffix
Description
AS2/V
Bearing outer ring with two lubrication
Feed of fresh lubricant to friction points. Fresh lubricant mixes with used lubricant at the friction point. Lubricant feed is by means of lubrication equipment. The time period for relubrication is shorter than that for the lubricant change interval.

See
Lubrication method
Lubrication condition
Recirculating lubrication
Lubrication technology
One-off lubrication
Hydrodynamic lubrication
Lubricant change intervall
Lubricant change
Lubricant
Lubricant paste
Oil
Grease
Lubrication film
Lubrication system
holes
in two offset planes (instead of one plane)
Standard
B
Bearing with spherical outside surface of outer ring
2C
Flinger shield on both sides
FA
Manufacturing variant
Standard
FA101
High and low temperature design –40 °C to +180 °C
FA106
Bearing subjected to special noise testing
FA107
Bearing with lubrication
Feed of fresh lubricant to friction points. Fresh lubricant mixes with used lubricant at the friction point. Lubricant feed is by means of lubrication equipment. The time period for relubrication is shorter than that for the lubricant change interval.

See