Schaeffler Product catalogue - medias
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Spherical roller bearings
 

Spherical roller bearings are suitable where:

 
 
  • bearing arrangements are subjected to high and very high radial loads ➤ section
  • relatively high axial loads occur on one or both sides, in addition to high radial forces ➤ section
  • dynamic or static misalignments of the shaft relative to the housing, or deflections of the shaft, must be freely compensated by the bearing ➤ section
  • high shock type loads must be supported dynamically
  • locating bearings with a very 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 are required.
 
   

Figure 1
Spherical roller bearing: comparison of 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 with barrel roller bearing
See Rolling bearing
of the same dimensions, compensation of misalignments

Fr =  radial load
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_21478883723_All.gif

 
 

Bearing design

 
 

The standard product range of spherical roller bearings comprises:

 
   
 

The bearings are available in the majority of sizes as X-life designs with significantly higher performance ➤ link . Larger catalogue bearings and other bearing designs ➤ GL 1.

 
 

Bearings of basic design

The outer ring has a curved raceway

 

Spherical roller bearings are part of the group of radial roller bearings. These self-retaining rolling bearings have two rows of rollers
Barrel-shaped, tapered or cylindrical rolling elements
with a mutually curved raceway in the outer ring and two raceways inclined relative to the bearing axis in the inner ring. This raceway design allows these bearings to combine a range of characteristics, which are essential to many applications, in one bearing, such as angular adjustability for example ➤ section . The symmetrical barrel rollers
Barrel-shaped, tapered or cylindrical rolling elements
are guided by brass, sheet steel or polyamide cages ➤ section .

 

Roller contact design

 

The stress
Mechanical, mechanical-thermal, mechanical-chemical or tribological influences acting individually or jointly on a component
distribution at the contact points between the rollers
Barrel-shaped, tapered or cylindrical rolling elements
and raceways is determined by the contact surface
The contact surface between two bodies under load, calculated according to Hertz
of the rollers. As a result, the roller geometry is matched to the raceway. This gives a favourable load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
distribution over the entire length of the roller and prevents both edge stresses and stress
Mechanical, mechanical-thermal, mechanical-chemical or tribological influences acting individually or jointly on a component
peaks at the ends of the roller ➤ Figure 2.

 
   

Figure 2
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 due to optimised roller and raceway profile

F =  load on the rollers

 

imageref_21406516747_All.gif

 

The bore is cylindrical or tapered

 

Bearings of basic design are supplied without 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 with a cylindrical bore. With the exception of series 233..-A, these bearings are also available with a tapered bore ➤ Figure 4.

 
imageref_17757201419_All.gif   Bearings with a tapered bore have a bore taper of 1:12 and the suffix K, whereas spherical roller bearings of the series 249, 240 and 241 have a bore taper of 1:30 and the suffix K30 ➤ Figure 4 and ➤ section .  
 

In addition to the design of the bore (cylindrical or tapered), the specific bearing design is also dependent on the bearing series and bearing size. The key distinguishing features are the:

 
   

Bearings with a loose central rib on the inner ring

 

A loose central rib provides axial guidance of the rollers
Barrel-shaped, tapered or cylindrical rolling elements
in the load-free zone ➤ Figure 5 and ➤ Table 3. This reduces friction
The resistance to relative movement of two bodies in contact with each other; subdivided into friction terms, friction types and friction conditions
in the bearing, which in turn leads to lower operating temperatures.

 
 

   

Figure 3
Spherical roller bearings of basic design, cylindrical bore

Fr =  radial load
Fa =  axial load
Symbole/00016410_mei_in_0k_0k.gif  Spherical roller bearing
See Rolling bearing
without central rib on inner ring
Symbole/00016411_mei_in_0k_0k.gif  Spherical roller bearing
See Rolling bearing
with rigid central rib on inner ring

 

imageref_21406518923_All.gif

 
   

Figure 4
Spherical roller bearings of basic design, tapered bore

Fr =  radial load
Fa =  axial load
Symbole/00016410_mei_in_0k_0k.gif  Spherical roller bearing
See Rolling bearing
without central rib on inner ring
Symbole/00016411_mei_in_0k_0k.gif  Spherical roller bearing
See Rolling bearing
with rigid central rib on inner ring

 

imageref_21406521099_All.gif

 
   

Figure 5
Spherical roller bearings of basic design, cylindrical or tapered bore, with loose central rib

Fr =  radial load
Fa =  axial load
Symbole/00016410_mei_in_0k_0k.gif  Cylindrical bore
Symbole/00016411_mei_in_0k_0k.gif  Tapered bore
Symbole/00016412_mei_in_0k_0k.gif  Loose central rib

 

imageref_21406523275_All.gif

 
 

Basic bearing design variants

Basic bearing design variants

 

Bearings of basic design are available in the following variants:

 
   
   
Table 1
Bearing design for bearings without central rib on inner ring
 

Design
Suffix
Medias/00016410_mei_in_0k_0k.gif
   
imageref_21406525451_All.gif
   
Two sheet steel cages,
surface hardened or coated, guidance on outer ring, X-life
E1-XL
Medias/00016411_mei_in_0k_0k.gif
   
imageref_21406527371_All.gif
   
One brass double comb cage,
guided by rollers, inner ring
with two lateral retaining ribs, X-life
E1A-XL-M
Medias/00016412_mei_in_0k_0k.gif
   
imageref_21406529291_All.gif
   
Two window cages made from glass fibre reinforced polyamide,
guidance on inner ring, X-life
E1-XL-TVPB

 
   
Table 2
Bearing design for bearings with rigid central rib on inner ring
 

Design
Suffix
Medias/00016410_mei_in_0k_0k.gif
   
imageref_21406544011_All.gif
   
Two brass cages,
guidance on inner ring, inner ring with two lateral retaining ribs and one central rib
MB
B-MB
Medias/00016411_mei_in_0k_0k.gif
   
imageref_21406545931_All.gif
   
One steel double comb cage, guidance on inner ring, inner ring with two lateral retaining ribs and one central rib
B-FB1
Medias/00016412_mei_in_0k_0k.gif
   
imageref_21406547851_All.gif
   
Two brass cages,
guidance on outer ring, inner ring with two lateral retaining ribs and one central rib
A-MA
AS-MA
Medias/00016413_mei_in_0k_0k.gif
   
imageref_21406549771_All.gif
   
One brass double comb cage, guidance on outer ring, inner ring with two lateral retaining ribs and one central rib, X-life
XL-MA1

 
   
Table 3
Bearing design for bearings with loose central rib
 

Design
Suffix
Medias/00016410_mei_in_0k_0k.gif
   
imageref_21406553483_All.gif
   
Two sheet steel cages,
surface hardened,
guidance on inner ring, X-life
BE-XL
Medias/00016411_mei_in_0k_0k.gif
   
imageref_21406568203_All.gif
   
Two sheet steel cages,
surface hardened,
guidance on outer ring, X-life, vibrating screen design
BE-XL-JPA-T41A
Medias/00016412_mei_in_0k_0k.gif
   
imageref_21406570123_All.gif
   
One brass double comb cage,
guidance on inner ring, inner ring with two lateral retaining ribs, X-life
BEA-XL-MB1

 
 

Sealed spherical roller bearings

 

A selection of standard bearings is also available with 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 ➤ Figure 6 and ➤ section .

 

Series 222, 223

 

Sealed bearings of series 222 and 223 include an oversize width and the prefix WS in the designation ➤ Figure 6 and ➤ section .

 

Series 240, 241

 

The main dimensions of sealed bearings
Rolling bearings with fitted seals for protection against lubricant loss and contamination.
of series 240 and 241 correspond to the main dimensions of open bearings.

 
imageref_17757210635_All.gif   Further information on sealed spherical roller bearings ➤ TPI 218.  
 

   

Figure 6
Spherical roller bearings of basic design, sealed on both sides

Symbole/00016410_mei_in_0k_0k.gif  Bearing with contact seal 2RSR (D < 160)
Symbole/00016411_mei_in_0k_0k.gif  Bearing with contact seal 2VSR (160 < D ≦ 320)
Symbole/00016412_mei_in_0k_0k.gif  Bearing with contact seal 2RSR (320 < D ≦ 620)

 

imageref_21406572811_All.gif

 
 

Spherical roller bearings for vibratory machinery

 

The rolling bearings fitted in vibratory machinery must support not only high loads and high speeds but also accelerations and centrifugal forces. In many cases, these applications involve adverse environmental conditions such as contamination and moisture.

 

Spherical roller bearings are matched to the operating conditions of vibratory machinery

 

The special spherical roller bearings developed by Schaeffler are matched to the operating conditions in vibratory machinery and have proved highly successful in practical use. In particular, the cages of the rolling bearings are subjected to stresses arising from high radial accelerations. In unfavourable cases, these may be overlaid by axial accelerations as well.

 

The support of angular misalignments reduces additional sliding motions

 

The rotating imbalance generates a rotating shaft 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)
and additional sliding motion within the bearings. This increases the friction
The resistance to relative movement of two bodies in contact with each other; subdivided into friction terms, friction types and friction conditions
and therefore 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. The special spherical roller bearings can support dynamic angular misalignments up to 0,15°.

 

Basic designs of special spherical roller bearings

 

Schaeffler special spherical roller bearings for vibratory machinery have the main dimensions of dimension series 23 (DIN 616:2000, ISO 15:2017).

 

Specification T41A (T41D)

 

Schaeffler spherical roller bearings for vibratory machinery are manufactured in accordance with the specification T41A or T41D ➤ Table 10. This takes into consideration the particular requirements of the appli­cation. The specification defines, for example, the tolerances
See
Running accuracy
Dimensional accuracy
of the bore and outside diameter, as well as the radial internal clearance of the bearings. The other tolerances
See
Running accuracy
Dimensional accuracy
are in accordance with tolerance class Normal to ISO 492:2014.

 
imageref_17757210635_All.gif   Schaeffler spherical roller bearings for vibratory machinery are described in detail in TPI 197. This can be requested from Schaeffler.  
 

Bearings with adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve or withdrawal sleeve

Ready-to-fit mounting kits facilitate the ordering and mounting of bearings

 

Complete bearing mounting kits are also available for use in locating spherical roller bearings with a tapered bore onto a cylindrical shaft journal. These units comprise the bearing, adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve, tab washer and locknut, or bearing and withdrawal sleeve ➤ Figure 7. Adapter
An accessory mounted on another element, for example a lubrication adapter
sleeves and withdrawal sleeves allow bearings to be located on smooth and stepped shafts ➤ Figure 16 and ➤ Figure 17. The fixing elements are described in the product tables and must also be stated when placing the order.

 
   

Figure 7
Spherical roller bearing
See Rolling bearing
with adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve

Fr =  radial load
Fa =  axial load
Symbole/00016410_mei_in_0k_0k.gif  Spherical roller bearing
See Rolling bearing
with rigid central rib on inner ring, with adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve
Symbole/00016411_mei_in_0k_0k.gif  Adapter sleeve
Symbole/00016412_mei_in_0k_0k.gif  Locknut
Symbole/00016413_mei_in_0k_0k.gif  Tab washer

 

imageref_21602835211_All.gif

 
 

X-life premium quality

imageref_19964530187_All.gif   Spherical roller bearings are available in numerous series and dimensions as X-life bearings ➤ Figure 8. These bearings exhibit considerably higher performance than conventional spherical roller bearings. This is achieved, for example, through the modified internal construction, higher surface quality
See DIN 55 350 part 11 and ISO 8402 for terminology and definitions.
of the contact areas, optimised contact geometry between rollers
Barrel-shaped, tapered or cylindrical rolling elements
and raceways, new roller dimensions with crowned ends and the optimised cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
design, as well as through the higher quality
See DIN 55 350 part 11 and ISO 8402 for terminology and definitions.
of the steel and rolling elements and a loose central rib ➤ Table 3.
 
   

Figure 8
Spherical roller bearing
See Rolling bearing
in X-life design

Symbole/00016410_mei_in_0k_0k.gif  Cage
Symbole/00016411_mei_in_0k_0k.gif  Barrel roller
Symbole/00016412_mei_in_0k_0k.gif  Outer ring
Symbole/00016413_mei_in_0k_0k.gif  Inner ring

 

imageref_21406574987_All.gif

 
 

Advantages

 

These technical enhancements offer a range of advantages, such as:

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

    See Contact surface
    distribution in the bearing and thus a higher dynamic load
    The term dynamic indicates that the operating condition is with the bearing rotating. This is not a variable load.
    carrying capacity of the bearings ➤ Figure 2
  • a higher running accuracy
    Measured in terms of radial runout and axial runout, due to the dimensional and geometrical tolerances of the bearing in motion, defined according to DIN
    and smooth running
  • running with reduced friction
    The resistance to relative movement of two bodies in contact with each other; subdivided into friction terms, friction types and friction conditions
    and greater energy efficiency
  • lower heat generation in the bearing
  • higher possible speeds
  • lower lubricant
    Gaseous, fluid, consistent, plastic or solid material for reduction of friction and wear between two friction elements.
    consumption and therefore longer maintenance
    Inspection, maintenance and repair of equipment and machines.
    intervals if relubrication is carried out
  • a measurably longer operating life
    See Life, rating
    of the bearings
  • high operational security
  • compact, environmentally-friendly bearing arrangements.
 

Lower operating costs, higher machine availability

 

In conclusion, these advantages improve the overall cost-efficiency of the bearing position significantly and thus bring about a sustainable increase in the efficiency of the machine and equipment.

 

Suffix XL

 

X-life spherical roller bearings include the suffix XL in the designation ➤ section and ➤ dimension table.

 
 

Areas of application

 

Due to their special technical features, X-life spherical roller bearings are highly suitable for bearing arrangements in:

 
 
  • dryer rolls and calenders
  • mining machinery, conveyor belts, crushers, vibrating screens, vertical mills, roller presses
  • continuous casting plant
  • passenger elevators
  • marine propulsion systems.
 
imageref_17757210635_All.gif   X-life indicates a high product performance density
Mass ratio of a lubricant with respect to its volume to DIN 51 757.

Usual units for solid materials (apparent density):
- gramms per cubic centimeter g/cm3

fluids:
- gramms per millilitre g/ml

gases:
- kilogrammes per cubic meter kg/cm3

Other permissible units are kg/dm3, kg/cm3, kg/l
and thus a particularly significant benefit to the customer.
 
 

Load carrying capacity

 

Suitable for very high radial loads and high axial loads

 

Spherical roller bearings can support high axial loads in both directions and very high radial loads. They are designed for very 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 and, since they have the maximum possible number of large and particularly long barrel rollers
Barrel-shaped, tapered or cylindrical rolling elements
(bearings in E1 design), are also suitable for the heaviest loads ➤ section .

 
 

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 of bearings with adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve or withdrawal sleeve

imageref_17757187211_All.gif   Due to their internal construction, spherical roller bearings can support high axial loads. Where bearings with adapter
An accessory mounted on another element, for example a lubrication adapter
sleeves or withdrawal sleeves are located on a smooth shaft without a fixed axial stop (e.g. rigid shoulder), the axial load
Force acting in the direction of the shaft.
carrying capacity of the 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
is dependent on the friction
The resistance to relative movement of two bodies in contact with each other; subdivided into friction terms, friction types and friction conditions
between the shaft and the sleeve.
 
imageref_18348417035_All.gif   If there is any doubt about the axial load
Force acting in the direction of the shaft.
carrying capacity of the location method, please consult Schaeffler.
 
 

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

See Contact surface
and higher speeds

Friction in the bearing rises with increasing load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
and speed

 

Spherical roller bearings support high axial forces from both directions. However, if very high axial loads occur in combination with very high speeds, the resulting increase in friction
The resistance to relative movement of two bodies in contact with each other; subdivided into friction terms, friction types and friction conditions
and temperature in the bearing must be taken into consideration.

 
 

Compensation of angular misalignments

 

Spherical roller bearings compensate dynamic and static angular misalignments

 

Due to the concave rolling element
Point or rotationally symmetrical bodies for transmitting loads between raceways.
raceway in the outer ring, spherical roller bearings are capable of angular adjustment ➤ section . As a result, they permit skewing between the outer and inner ring within certain limits, without causing damage
Loss of essential or required characteristics in equipment, machinery or plant or their component parts.
to the bearings, and can thus compensate misalignments, shaft deflections and housing
See Mounting dimenstions
deformations.

 
 

Permissible adjustment angle

 

The permissible adjustment angle is stated for loads P < 0,1 · Cr ➤ Table 4. The adjustment angles apply if:

 
 
  • the angular deviation is constant (static angular misalignment)
  • the rotating component is the inner ring.
 
 

The extent to which the stated values can be used in practice is essentially dependent on the design of the bearing arrangement, sealing
See Seals
etc.

 
 

Reduced adjustment angle

imageref_18348417035_All.gif   If the rotating component is the outer ring, the inner ring undergoes tumbling motion or the adjustment angles are larger than stated in the table, the angular adjustment facility of the bearings is smaller. In such cases, please consult Schaeffler.  
 

Permissible adjustment angle for sealed bearings

The permissible adjustment angle is smaller for sealed bearings

 

In sealed spherical roller bearings, the angular adjustment facility is 0,5° from the central position. The sealing
See Seals
function is not adversely affected by misalignments occurring up to this value.

 
   
Table 4
Permissible adjustment angle of spherical roller bearings
 

Bearing series
Adjustment angle
°
213..-E1, 222..-E1, 222..-BE(BEA),230, 230..-E1(E1A), 230..‑BE(BEA), 238, 239, 240
1,5
223..-E1, 223.. -BE(BEA), 231, 231..E1(E1A), 231..-BE(BEA), 232, 232..-E1(E1A), 232.. -BE(BEA), 233..-A, 240..-BE(BEA),
241, 241..-BE(BEA)
2

 
 

Lubrication

 

The bearings can be lubricated via a circumferential groove 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
holes

 

In order to ensure good lubrication, most spherical roller bearings have a circumferential groove and three 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. The lubricant
Gaseous, fluid, consistent, plastic or solid material for reduction of friction and wear between two friction elements.
is pressed into the bearing via the groove and holes ➤ Figure 9. Due to the direct and symmetrical feed system, a uniform supply of lubricant
Gaseous, fluid, consistent, plastic or solid material for reduction of friction and wear between two friction elements.
to the rows of rollers
Barrel-shaped, tapered or cylindrical rolling elements
is achieved. On both sides of the bearing, sufficiently large cavities for collection of the used grease
Lubricating grease which is no longer usable or capable of lubrication
or openings for the escape of grease
See
Lubricant
Grease cartridge
Fatty acids
must be provided.

 

Series 213

 

Bearings of series 213 with a bore diameter d ≦ 35 mm do not have 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 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.

 

Lubrication for ungreased bearings

 

Open spherical roller bearings are not greased. These bearings must be lubricated with oil
Fluid lubricant with a mineral oil and/or synthetic oil base, usually with active ingredients or additives.
or grease.

 
imageref_17757187211_All.gif   If shafts with a vertical axis are supported using spherical roller bearings, particular attention must be paid to ensuring the reliable provision of lubricant
Gaseous, fluid, consistent, plastic or solid material for reduction of friction and wear between two friction elements.
to the bearings.
 

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.

 

Observe oil change
See Lubricant change
intervals

 

Aged oil
Fluid lubricant with a mineral oil and/or synthetic oil base, usually with active ingredients or additives.
and additives
Lubricant additive to improve viscosity-temperature behaviour or pour point, prevent corrosion, oxidation or ageing or reduce wear or foaming
in the oil
Fluid lubricant with a mineral oil and/or synthetic oil base, usually with active ingredients or additives.
can impair the operating life
See Life, rating
of plastics at high temperatures. As a result, stipulated oil change
See Lubricant change
intervals must be strictly observed.

 
 

Lubrication-specific suffixes

 
 

Suffixes

 

 

H40 without 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 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
holes
H40CA 6 lubrication holes in the outer ring
H40AB 6 lubrication holes in the inner ring
H40AC 6 lubrication holes and one 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 inner ring
S lubrication groove 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
holes in the outer ring
SY 3 lubrication holes in the outer ring, no 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

 

 
   

Figure 9
Lubrication of the bearing via 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 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
holes in the outer ring

Symbole/00016410_mei_in_0k_0k.gif  Lubrication groove 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
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
Symbole/00016411_mei_in_0k_0k.gif  Cavity for collecting grease

 

imageref_21602840843_All.gif

 
 

Sealed bearings

Greased bearings are normally maintenance-free

 

Sealed bearings are supplied already filled 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 and are maintenance-free for most applications. Whether or not a bearing requires relubrication during its operating life
See Life, rating
is dependent on the operating conditions (e.g. on the operating temperatures and operating speeds). Where bearings cannot be relubricated, the grease
See
Lubricant
Grease cartridge
Fatty acids
operating life
See Life, rating
must be observed.

 
 

Sealing

 

Certain bearings are also available with seals

 

Sealed spherical roller bearings have sealing
See Seals
shields on both sides, which protect the bearing reliably against contamination. In order to ensure optimum sealing
See Seals
integrity, various sealing
See Seals
concepts are used, which are determined by size. The bearings should not be heated above +80 °C or washed out prior to mounting.

 
 

Series 240, 241

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
material used is FKM

 

For spherical roller bearings of series 240 and 241, the standard 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 is fluoro elastomer.

 
imageref_17757187211_All.gif   Seals made from fluoro elastomer, such as Viton (FKM, FPM) for example, comprise particularly high performance materials which, when heated above approx. +300 °C, may release vapours and gases that are harmful to health if they are inhaled or come into contact with the eyes. Contact with 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
which have been heated to such high temperatures is still dangerous even after cooling. Contact with skin must be avoided in all cases. A doctor must be consulted immediately if such vapours are inhaled. In all cases, the user is responsible for the safe handling 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
during the operating life, as well as for scrapping 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
and disposing of them correctly.
 
imageref_18348417035_All.gif   Such temperatures may occur, for example, if a welding torch is used in the dismantling of a bearing. In these cases, the currently valid safety data sheet must be observed.  
 

Speeds

 
 

Two speeds are indicated in the product tables ➤ dimension table:

 
 
  • the kinematic limiting speed nG
  • the thermal speed rating nϑr.
 
 

Limiting speeds

imageref_17757187211_All.gif   The limiting speed nG is the kinematically permissible speed of the bearing. Even under favourable mounting and operating conditions, this value should not be exceeded without prior consultation with Schaeffler    ➤ link.  
 

Reference speeds

nϑr is used to calculate nϑ

 

The thermal speed rating nϑr is not an application-oriented speed limit, but is a calculated ancillary value for determining the thermally safe operating speed nϑ    ➤ link.

 

Bearings with contact seals

 

For bearings with contact seals, no reference speeds are defined in accordance with DIN ISO 15312:2004. As a result, only the limiting speed nG is given in the product tables for these bearings.

 
 

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 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.
 
 

 

Possible operating temperatures of spherical roller bearings ➤ Table 5.

 
   
Table 5
Permissible temperature ranges
 

Operating temperature
Open spherical
roller bearings
Sealed spherical
roller bearings
with brass or sheet steel cage
with polyamide cage PA66
Series 222, 223
Series 240, 241
imageref_19988082955_All.gif
   
–30 °C to +200 °C
–30 °C to +120 °C
–40 °C to +100 °C,
for short periods up
to +120 °C, limited by the lubricant
Gaseous, fluid, consistent, plastic or solid material for reduction of friction and wear between two friction elements.
and
seal material
–30 °C to +180 °C,
for short periods up
to +200 °C, limited by the lubricant
Gaseous, fluid, consistent, plastic or solid material for reduction of friction and wear between two friction elements.
and
seal material

 
imageref_18348417035_All.gif   In the event of anticipated temperatures which lie outside the stated values, please contact Schaeffler.  
 

Cages

 

Solid brass cages are used as standard

 

Standard cages for spherical roller bearings ➤ Table 1, ➤ Table 2, ➤ Table 3, ➤ Table 6. Other cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
designs are available by agreement. With such cages, however, suitability for high speeds and temperatures as well as the 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 may differ from the values for the bearings with standard cages. Essential information on cages   ➤ link.

 
 

Cages in design B and in bearings without a suffix

Solid brass cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
or sheet metal cage

 

Spherical roller bearings with a rigid central rib on the inner ring (design B or bearings without a suffix) have a solid brass cage. Bearings without a cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
suffix
Addition to the designation, consisting of letters and/or numbers, for example, it may indicate variants of a series
have sheet metal cages ➤ Table 2 and ➤ Table 6.

 
 

Cages in bearings with the suffix
Addition to the designation, consisting of letters and/or numbers, for example, it may indicate variants of a series
MB/MB1, MA/MA1

Solid brass cage

 

Bearings with the suffix MB or MB1 have solid brass cages, which are guided on the inner ring. In bearings with the suffix MA or MA1, the solid brass cages are guided on the outer ring ➤ Table 2, ➤ Table 3 and ➤ Table 6.

 
 

Bearings with the suffix M

Solid brass cage

 

Bearings with the suffix M have a roller-guided solid brass cage ➤ Table 1 and ➤ Table 6.

 
 

Bearings with the suffix E1/BE

Sheet steel cage, solid brass cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
or solid cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
made from polyamide PA66

 

Bearings with the suffix E1 and BE and without a cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
suffix
Addition to the designation, consisting of letters and/or numbers, for example, it may indicate variants of a series
have sheet steel cages. The two cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
halves are retained by a guiding ring or loose central rib in the outer or inner ring ➤ Table 1 and ➤ Table 6. The other bearings of E1 design have solid cages made from glass fibre reinforced polyamide PA66 or solid brass cages (suffix TVPB or M). The sheet steel cages are surface hardened or coated and, as a result, are particularly well protected against wear.

 
 

   
Table 6
Cage, cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
suffix, bore code
 

Bearing series
Cage design
Table
Bearing series
Cage design
Table
Bearing series
Cage design
Table
Sheet steel cages
Plastic cage
Brass cage
Steel cage
Guidance on
Guidance by rollers
Guidance on
Inner ring
Outer ring
Inner ring
Inner ring
Outer ring


TVPB
M
MB1
MB
MA
FB1
Bore code
Bore code
Bore code
213..-E1-XL
- 08 to 18
04 to 07 19 to 22
➤ Table 1, Medias/00016410_mei_in_0k_0k.gif and Medias/00016412_mei_in_0k_0k.gif
213..-E1-XL
- - - - ➤ Table 1, Medias/00016410_mei_in_0k_0k.gif and Medias/00016412_mei_in_0k_0k.gif
213..-E1-XL
- ➤ Table 1, Medias/00016410_mei_in_0k_0k.gif and Medias/00016412_mei_in_0k_0k.gif
222..-E1-XL
- 05 to 36
- ➤ Table 1, Medias/00016410_mei_in_0k_0k.gif
222..-E1-XL
- - - - ➤ Table 1, Medias/00016410_mei_in_0k_0k.gif
222..-E1-XL
- ➤ Table 1, Medias/00016410_mei_in_0k_0k.gif
222..-BE-XL
38 to 48
- - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
222..-BE-XL
- - - - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
222..-BE-XL
- ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
222..-BEA-XL
- - - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
222..-BEA-XL
- 52 to 72
- - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
222..-BEA-XL
- ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
223..-E1-XL
- 08 to 30
- ➤ Table 1, Medias/00016410_mei_in_0k_0k.gif
223..-E1-XL
- - - - ➤ Table 1, Medias/00016410_mei_in_0k_0k.gif
223..-E1-XL
- ➤ Table 1, Medias/00016410_mei_in_0k_0k.gif
223..-BE-XL
32 to 44
- - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
223..-BE-XL
- - - - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
223..-BE-XL
- ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
223..-BE..-XL-JPA
- 32 to 44
- ➤ Table 3, Medias/00016411_mei_in_0k_0k.gif
223..-BE..-XL-JPA
- - - - ➤ Table 3, Medias/00016411_mei_in_0k_0k.gif
223..-BE..-XL-JPA
- ➤ Table 3, Medias/00016411_mei_in_0k_0k.gif
223..-BEA-XL
- - - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
223..-BEA-XL
- 48 to 56
- - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
223..-BEA-XL
- ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
230..-E1-XL
- - 22 to 40
➤ Table 1, Medias/00016412_mei_in_0k_0k.gif
230..-E1-XL
- - - - ➤ Table 1, Medias/00016412_mei_in_0k_0k.gif
230..-E1-XL
- ➤ Table 1, Medias/00016412_mei_in_0k_0k.gif
230..-E1A-XL
- - - ➤ Table 1, Medias/00016411_mei_in_0k_0k.gif
230..-E1A-XL
22 to 40
- - - ➤ Table 1, Medias/00016411_mei_in_0k_0k.gif
230..-E1A-XL
- ➤ Table 1, Medias/00016411_mei_in_0k_0k.gif
230..-BE-XL
44 to 60
- - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
230..-BE-XL
- - - - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
230..-BE-XL
- ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
230..-BEA-XL
- - - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
230..-BEA-XL
- 64 to /630
- - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
230..-BEA-XL
- ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
230
- - - ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
230
- - /670 to /1250
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
230
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
Bearing series
Cage design
Table
Bearing series
Cage design
Table
Bearing series
Cage design
Table
Sheet steel cages
Plastic cage
Brass cage
Steel cage
Guidance on
Guidance by rollers
Guidance on
Inner ring
Outer ring
Inner ring
Inner ring
Outer ring


TVPB
M
MB1
MB
MA
FB1
Bore code
Bore code
Bore code
231..-E1-XL
- - 20 to 38
➤ Table 1, Medias/00016412_mei_in_0k_0k.gif
231..-E1-XL
- - - - ➤ Table 1, Medias/00016412_mei_in_0k_0k.gif
231..-E1-XL
- ➤ Table 1, Medias/00016412_mei_in_0k_0k.gif
231..-E1A-XL
- - - ➤ Table 1, Medias/00016411_mei_in_0k_0k.gif
231..-E1A-XL
20 to 38
- - - ➤ Table 1, Medias/00016411_mei_in_0k_0k.gif
231..-E1A-XL
- ➤ Table 1, Medias/00016411_mei_in_0k_0k.gif
231..-BE-XL
40 to 56
- - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
231..-BE-XL
- - - - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
231..-BE-XL
- ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
231..-BEA-XL
- - - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
231..-BEA-XL
- 60 to /560
- - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
231..-BEA-XL
- ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
231
- - - ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
231
- - /600 to /1000
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
231
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
232..-E1-XL
- - 18 to 36
➤ Table 1, Medias/00016412_mei_in_0k_0k.gif
232..-E1-XL
- - - - ➤ Table 1, Medias/00016412_mei_in_0k_0k.gif
232..-E1-XL
- ➤ Table 1, Medias/00016412_mei_in_0k_0k.gif
232..-E1A-XL
- - - ➤ Table 1, Medias/00016411_mei_in_0k_0k.gif
232..-E1A-XL
18 to 36
- - - ➤ Table 1, Medias/00016411_mei_in_0k_0k.gif
232..-E1A-XL
- ➤ Table 1, Medias/00016411_mei_in_0k_0k.gif
232..-BE-XL
38 to 48
- - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
232..-BE-XL
- - - - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
232..-BE-XL
- ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
232..-BEA-XL
- - - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
232..-BEA-XL
- 52 to /500
- - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
232..-BEA-XL
- ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
232
- - - ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
232
- - /530 to /800
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
232
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
233..-A, ..-AS
- - - ➤ Table 2, Medias/00016412_mei_in_0k_0k.gif
233..-A, ..-AS
- - - 20 to 40
➤ Table 2, Medias/00016412_mei_in_0k_0k.gif
233..-A, ..-AS
- ➤ Table 2, Medias/00016412_mei_in_0k_0k.gif
238
- - - ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif and Medias/00016413_mei_in_0k_0k.gif
238
- - /600 to /1180
/6301)
➤ Table 2, Medias/00016410_mei_in_0k_0k.gif and Medias/00016413_mei_in_0k_0k.gif
238
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif and Medias/00016413_mei_in_0k_0k.gif
239
- - - ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
239
- - 36 to /1180
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
239
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
240..-BE-XL
24 to 60
- - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
240..-BE-XL
- - - - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
240..-BE-XL
- ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
240..-BEA-XL
- - - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
240..-BEA-XL
- 64 to /630
- - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
240..-BEA-XL
- ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
240
- - - ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
240
- - /670 to /1120
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
240
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
241..-BE-XL
22 to 88
- - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
241..-BE-XL
- - - - ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
241..-BE-XL
- ➤ Table 3, Medias/00016410_mei_in_0k_0k.gif
241..-BEA-XL
- - - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
241..-BEA-XL
- 92 to /560
- - ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
241..-BEA-XL
- ➤ Table 3, Medias/00016412_mei_in_0k_0k.gif
241
- - - ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif and Medias/00016411_mei_in_0k_0k.gif
241
- - /600 to /1000
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif and Medias/00016411_mei_in_0k_0k.gif
241
up to /900
➤ Table 2, Medias/00016410_mei_in_0k_0k.gif and Medias/00016411_mei_in_0k_0k.gif
248
- - - ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
248
- - 92 to /1800
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
248
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
249
- - - ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
249
- - /670 to /1320
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif
249
- ➤ Table 2, Medias/00016410_mei_in_0k_0k.gif


 
 
______
 1    Cage designation MA1.
 
imageref_18348417035_All.gif   For high continuous temperatures and applications with difficult operating conditions, bearings with brass or sheet steel cages should be used. If there is any uncertainty regarding cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
suitability, please consult Schaeffler.
 
 

Internal clearance

 
 

Radial internal clearance

The standard is CN

 

Spherical roller bearings with cylindrical and tapered bore are manufactured as standard with radial internal clearance CN (normal) ➤ Table 7 and ➤ Table 8.

 
imageref_18348417035_All.gif   A number of bearings are also available by agreement with the smaller internal clearance C2 and with the larger internal clearance C3 and C4 ➤ Table 7 and ➤ Table 8.  
 

Spherical roller bearings with cylindrical bore

imageref_17757201419_All.gif   The values for radial internal clearance correspond to DIN 620-4:2004 (ISO 5753-1:2009) ➤ Table 7. They are valid for bearings which are free from load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
and measurement forces (without elastic deformation).
 
   
Table 7
Radial internal clearance of spherical roller bearings with cylindrical bore
 

Nominal
bore diameter
Radial internal clearance
d
C2
(Group 2)
CN
(Group N)
C3
(Group 3)
C4
(Group 4)
mm
μm
μm
μm
μm
over
incl.
min.
max.
min.
max.
min.
max.
min.
max.
18
24
10
20
20
35
35
45
45
60
24
30
15
25
25
40
40
55
55
75
30
40
15
30
30
45
45
60
60
80
40
50
20
35
35
55
55
75
75
100
50
65
20
40
40
65
65
90
90
120
65
80
30
50
50
80
80
110
110
145
80
100
35
60
60
100
100
135
135
180
100
120
40
75
75
120
120
160
160
210
120
140
50
95
95
145
145
190
190
240
140
160
60
110
110
170
170
220
220
280
160
180
65
120
120
180
180
240
240
310
180
200
70
130
130
200
200
260
260
340
200
225
80
140
140
220
220
290
290
380
225
250
90
150
150
240
240
320
320
420
250
280
100
170
170
260
260
350
350
460
280
315
110
190
190
280
280
370
370
500
315
355
120
200
200
310
310
410
410
550
355
400
130
220
220
340
340
450
450
600
400
450
140
240
240
370
370
500
500
660
450
500
140
260
260
410
410
550
550
720
500
560
150
280
280
440
440
600
600
780
560
630
170
310
310
480
480
650
650
850
630
710
190
350
350
530
530
700
700
920
710
800
210
390
390
580
580
770
770
1010
800
900
230
430
430
650
650
860
860
1120
900
1000
260
480
480
710
710
930
930
1220
1000
1120
290
530
530
770
770
1050
1050
1430
1120
1250
320
580
580
840
840
1140
1140
1560
1250
1400
350
630
630
910
910
1240
1240
1700
1400
1600
380
700
700
1020
1020
1390
1390
1890
1600
1800
420
780
780
1140
1140
1550
1550
2 090

 
 

Spherical roller bearings with tapered bore

imageref_17757201419_All.gif   The values for radial internal clearance correspond to DIN 620-4:2004 (ISO 5753-1:2009) ➤ Table 8. These are valid for bearings which are free from load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
and measurement forces (without elastic deformation).
 
   
Table 8
Radial internal clearance of spherical roller bearings with tapered bore
 

Nominal
bore diameter
Radial internal clearance
d
C2
(Group 2)
CN
(Group N)
C3
(Group 3)
C4
(Group 4)
mm
μm
μm
μm
μm
over
incl.
min.
max.
min.
max.
min.
max.
min.
max.
18
24
15
25
25
35
35
45
45
60
24
30
20
30
30
40
40
55
55
75
30
40
25
35
35
50
50
65
65
85
40
50
30
45
45
60
60
80
80
100
50
65
40
55
55
75
75
95
95
120
65
80
50
70
70
95
95
120
120
150
80
100
55
80
80
110
110
140
140
180
100
120
65
100
100
135
135
170
170
220
120
140
80
120
120
160
160
200
200
260
140
160
90
130
130
180
180
230
230
300
160
180
100
140
140
200
200
260
260
340
180
200
110
160
160
220
220
290
290
370
200
225
120
180
180
250
250
320
320
410
225
250
140
200
200
270
270
350
350
450
250
280
150
220
220
300
300
390
390
490
280
315
170
240
240
330
330
430
430
540
315
355
190
270
270
360
360
470
470
590
355
400
210
300
300
400
400
520
520
650
400
450
230
330
330
440
440
570
570
720
450
500
260
370
370
490
490
630
630
790
500
560
290
410
410
540
540
680
680
870
560
630
320
460
460
600
600
760
760
980
630
710
350
510
510
670
670
850
850
1090
710
800
390
570
570
750
750
960
960
1220
800
900
440
640
640
840
840
1070
1070
1370
900
1000
490
710
710
930
930
1190
1190
1520
1000
1120
540
780
780
1020
1020
1300
1300
1650
1120
1250
600
860
860
1120
1120
1420
1420
1800
1250
1400
660
940
940
1220
1220
1550
1550
1960
1400
1600
740
1060
1060
1380
1380
1750
1750
2 200
1600
1800
820
1180
1180
1540
1540
1950
1950
2 500

 
 

Dimensions, tolerances

 
 

Dimension standards

imageref_17757201419_All.gif   The main dimensions of spherical roller bearings correspond to DIN 635‑2:2009, DIN 616:2000 and ISO 15:2017.  

Width tolerances
See
Running accuracy
Dimensional accuracy
for bearings with the suffixes BE and BEA

 

For spherical roller bearings with the suffixes BE and BEA, the width tolerances
See
Running accuracy
Dimensional accuracy
are reduced by half compared to the standard values. Values ➤ Table 9. The running accuracy
Measured in terms of radial runout and axial runout, due to the dimensional and geometrical tolerances of the bearing in motion, defined according to DIN
corresponds to tolerance class 5.

 
   
Table 9
Width tolerances
See
Running accuracy
Dimensional accuracy
for spherical roller bearings with the suffixes BE and BEA
 

Nominal bore diameter
Width deviation
d
tΔBs
mm
μm
over
incl.
U
L
18
30
0
–60
30
50
0
–60
50
80
0
–75
80
120
0
–100
120
180
0
–125
180
250
0
–150
250
315
0
–175
315
400
0
–200
400
500
0
–225
500
630
0
–250
630
800
0
–375
800
1000
0
–500

 
 
______
Tolerance symbols ➤ Table
U =  upper limit deviation
L =  lower limit deviation
 
 

Specification T41A and T41D

The tolerances
See
Running accuracy
Dimensional accuracy
for d and D are restricted

 

Spherical roller bearings to specification T41A and T41D have restricted tolerances
See
Running accuracy
Dimensional accuracy
for the inside and outside diameter ➤ Table 10. In bearings with a tapered bore, the reduced tolerance range applies to the outside diameter only.

 
   
Table 10
Restricted diameter tolerances
See
Running accuracy
Dimensional accuracy
for the inner and outer ring in bearings to specification T41A and T41D
 

Inner ring
Outer ring
Nominal
bore diameter
Bore deviation
Nominal outer ring diameter
Outside diameter deviation
d
tΔdmp
D
tΔDmp
mm
μm
mm
μm
over
incl.
U
L
over
incl.
U
L
30
50
0
–7
80
150
–5
–13
50
80
0
–9
150
180
–5
–18
80
120
0
–12
180
315
–10
–23
120
180
0
–15
315
400
–13
–28
180
250
0
–18
400
500
–13
–30
250
315
0
–21
500
630
–15
–35

 
 
______
Tolerance symbols ➤ Table
U =  upper limit deviation
L =  lower limit deviation
 
 

Chamfer dimensions

imageref_17757201419_All.gif   The limiting dimensions for chamfer dimensions correspond to DIN 620‑6:2004. Overview and limiting values   ➤ section. Nominal value of chamfer dimension ➤ dimension table.  
 

Tolerances

imageref_17757201419_All.gif   The tolerances
See
Running accuracy
Dimensional accuracy
for the dimensional and running accuracy
Measured in terms of radial runout and axial runout, due to the dimensional and geometrical tolerances of the bearing in motion, defined according to DIN
of spherical roller bearings correspond to tolerance class Normal in accordance with ISO 492:2014. Tolerance values ➤ Table . The tolerance values for tapered bores with a taper angle 1:12 correspond to ISO 492 ➤ Table ; the tolerance values for tapered bores with a taper angle 1:30 correspond to ➤ Table . The running tolerances
See
Running accuracy
Dimensional accuracy
for spherical roller bearings with the suffixes BE and BEA correspond to tolerance class 5. Tolerance values in accordance with ISO 492 ➤ Table .
 
imageref_18348417035_All.gif   For bearing arrangements with higher requirements for dimensional and running accuracy, spherical roller bearings are available with the tolerance class 5 to ISO 492:2014. In such cases, please consult Schaeffler.  
 

Suffixes

 
 

For a description of the suffixes used in this chapter ➤ Table 11 and medias interchange http://www.schaeffler.de/std/1D52.

 
   
Table 11
Suffixes and corresponding descriptions
 

Suffix
Description of suffix
A-MA,
AS-MA
Two brass cages,
guidance on outer ring, inner ring with two lateral retaining ribs and one central rib
Standard combinations
B-FB1
One steel cage,
guidance on inner ring, inner ring with two lateral retaining ribs and one central rib
BE-XL
Two sheet steel cages,
surface hardened, guidance on inner ring, X-life
BE-XL-JPA
Two sheet steel cages,
surface hardened, guidance on outer ring, X-life
BEA-XL-MB1
One brass double comb cage,
guidance on inner ring, inner ring with two lateral retaining ribs, X-life
E1-XL
Two sheet steel cages,
surface hardened or coated, guidance on outer ring, X-life
E1-XL-TVPB
Two window cages made from glass fibre reinforced polyamide, guidance on inner ring, X-life
E1A-XL-M
One brass double comb cage,
guided by rollers, inner ring with two lateral retaining ribs, X-life
MB,
B-MB
Two brass cages,
guidance on inner ring, inner ring with two lateral retaining ribs and one central rib
MA1
One brass cage,
guidance on outer ring, inner ring with two lateral retaining ribs and one central rib
2RSR Contact 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 seal) on both sides with sheet steel reinforcement, made from nitrile rubber (NBR);
grease fill level 25% to 40%, filled with high pressure grease
Standard
2VSR Contact 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 seal) on both sides with sheet steel reinforcement, made from fluoro rubber (FKM);
grease fill level 60% to 100%, filled with high temperature grease
continued ▼

 
   
Table 12
Suffixes and corresponding descriptions
 

Suffix
Description of suffix
C2
Radial internal clearance C2 (smaller than normal)
Available
by agreement
C3
Radial internal clearance C3 (larger than normal)
C4
Radial internal clearance C4 (larger than C3)
H40 Without 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 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
holes
H40CA 6 lubrication holes in the outer ring
H40AB 6 lubrication holes in the inner ring
H40AC 6 lubrication holes and one 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 inner ring
H78(*) 3 uniformly distributed threaded holes in one end
face of the outer ring
(* weight-oriented module letter, please contact us)
H151 One 45° retaining slot in the outer ring
H151B One 15° retaining slot in the outer ring
K Tapered bore, taper 1:12
K30 Tapered bore, taper 1:30
P5 Dimensional and running accuracy
Measured in terms of radial runout and axial runout, due to the dimensional and geometrical tolerances of the bearing in motion, defined according to DIN
in accordance
with ISO tolerance class 5
S Lubrication groove 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
holes in outer ring
SY 3 lubrication holes in the outer ring, no 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
T41A For oscillating load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
with restricted diameter tolerances, radial internal clearance C4
T41D For oscillating load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
with restricted diameter tolerances, radial internal clearance C4,
bore with thin chromium coating
W209B Inner ring made from case hardening steel
XL
X-life bearing
continued ▲

 
 

Structure of bearing designation

 

Examples of composition of bearing designation

 

The 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
of bearings follows a set model. Examples ➤ Figure 10 to ➤ Figure 13. The composition of designations is subject to DIN 623-1    ➤ Figure.

 
 

   

Figure 10
Spherical roller bearing
See Rolling bearing
with cylindrical bore, without central rib on inner ring: 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
structure


 

imageref_21406579339_en.gif

 
   

Figure 11
Spherical roller bearing
See Rolling bearing
for vibratory machinery, with cylindrical bore, without central rib on inner ring, to specification T41A: 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
structure


 

imageref_21406632715_en.gif

 
   

Figure 12
Spherical roller bearing
See Rolling bearing
with tapered bore, rigid central rib on inner ring: 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
structure


 

imageref_21406634891_en.gif

 
   

Figure 13
Spherical roller bearing
See Rolling bearing
with tapered bore and adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve, without central rib on inner ring: 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
structure


 

imageref_21406637067_en.gif

 
 

Dimensioning

 
 

Equivalent dynamic bearing load

P = a substitute force for combined load
Indication of a force acting in a non-perpendicular direction on the bearing.
Load angle b not equal to 0° or 90°.
and various load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
cases

 

The basic 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
equation L = (C/P)p used in the dimensioning of bearings under dynamic load
The term dynamic indicates that the operating condition is with the bearing rotating. This is not a variable load.
assumes a load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
of constant magnitude and direction. In radial bearings, this is a purely radial load. If this condition is not met, an equivalent dynamic bearing load P must be determined for the 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
calculation. In the case of radial bearings, this is a radial load
A force which acts at an angle of b = 0°.
of constant magnitude and direction, which has the same effect on the 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
as the load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
occurring in practice.

 

Fa/Fr ≦ e or Fa/Fr > e

 

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

See Contact surface
ratio Fa/Fr and the calculation factor e ➤ Equation 1 and ➤ Equation 2.

 

Equation 1
Equivalent dynamic load
 
imageref_17794274443_All.gif


Equation 2
Equivalent dynamic load
 
imageref_19551970059_All.gif

Legend

 
P
 N
Equivalent dynamic bearing load
Fr
 N
Radial load
Fa
 N
Axial load
e, Y1, Y2
Factors ➤ dimension table.
 
 

Equivalent static bearing load

 

For spherical roller bearings subjected to static load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
➤ Equation 3.

 

Equation 3
Equivalent static load
 
imageref_10903634315_All.gif

Legend

 
P0
 N
Equivalent static bearing load
F0r, F0a
 N
Largest radial or axial static bearing load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
present (maximum load)
Y0
Factor ➤ dimension table.
 
 

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

See Contact surface
safety factor

S0 = C0/P0

 

In addition to the basic rating life L (L10h, Lhmr), it is also always necessary to check the static load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
safety factor S0
 ➤ Equation 4.

 

Equation 4
Static Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.See Contact surface safety factor
 
imageref_27021597814984331_All.gif

Legend

 
S0
Static load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
safety factor
C0
 N
Basic static load
Load which, for example, is to be supported at a friction point. Also strain from pressure and/or heat.

See Contact surface
rating
P0
 N
Equivalent static bearing load.
 
 

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 of bearings with adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve

imageref_17757187211_All.gif   Where bearings with adapter
An accessory mounted on another element, for example a lubrication adapter
sleeves are located on a smooth shaft without a fixed axial stop (e.g. rigid shoulder), their axial load
Force acting in the direction of the shaft.
carrying capacity is dependent on the friction
The resistance to relative movement of two bodies in contact with each other; subdivided into friction terms, friction types and friction conditions
between the shaft and the sleeve ➤ section .
 
imageref_18348417035_All.gif   If there is any doubt about the axial load
Force acting in the direction of the shaft.
carrying capacity of the location method, please consult Schaeffler.
 
 

Minimum load

 

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

See Contact surface
of P = C0r/100 is required

 

In order that no slippage occurs between the contact partners, the spherical roller bearings must be constantly subjected to a sufficiently high radial load. Based on experience, a minimum radial load
A force which acts at an angle of b = 0°.
of the order of P = C0r/100 is thus necessary for continuous operation.

 
imageref_18348417035_All.gif   If the minimum radial load
A force which acts at an angle of b = 0°.
is lower than indicated above, please consult Schaeffler.
 
 

Design of bearing arrangements

 

Support bearing rings over their entire circumference and width

 

In order to allow full utilisation of 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 bearings and thus also achieve the requisite rating life, the bearing rings must be rigidly and uniformly supported by means of contact 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
over their entire circumference and over the entire width of the raceway. Support can be provided by means of a cylindrical or tapered seating surface ➤ Figure 16 to ➤ Figure 18. The 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 mating parts must meet specific requirements ➤ Table 13, ➤ Table 14, ➤ Table 16.

 
 

Radial location – bearings with cylindrical bore

For secure radial location, tight fits are necessary

 

In addition to supporting the rings adequately, the bearings must also be securely located in a radial direction, to prevent creep of the bearing rings on the mating parts under load ➤ Figure 14. This is generally achieved by means of tight fits between the bearing rings and the mating parts. If the rings are not secured adequately or correctly, this can cause severe damage
Loss of essential or required characteristics in equipment, machinery or plant or their component parts.
to the bearings and adjacent machine parts. Influencing factors, such as the conditions of rotation, magnitude of the load, internal clearance, temperature conditions, design of the mating parts, mounting and dismounting options etc., must be taken into consideration in the selection of fits.

 
imageref_17757187211_All.gif   If shock type loads occur, tight fits (transition fit or interference fit) are required to prevent the rings from coming loose at any point. Clearance, transition or interference fits ➤ Table and ➤ Table .  
 

The following information provided in Technical principles must be taken into consideration in the design of bearing arrangements:

 
   
 

Axial location – bearings with cylindrical bore

The bearings must also be securely located in an axial direction

 

As a tight fit alone is not normally sufficient to also locate the bearing rings securely on the shaft or in the housing
See Mounting dimenstions
bore in an axial direction, this must usually be achieved by means of an additional axial location or retention method. The axial location of the bearing rings must be matched to the type of bearing arrangement. Shaft and housing
See Mounting dimenstions
shoulders, housing
See Mounting dimenstions
covers, nuts, spacer rings and retaining rings etc., are fundamentally suitable ➤ Figure 14, ➤ Figure 15, ➤ Figure 16 and ➤ Figure 17.

 
   

Figure 14
Location of a spherical roller bearing
See Rolling element
in a rotary kiln – example

Symbole/00016410_mei_in_0k_0k.gif  Spherical roller bearing
See Rolling bearing
24164‑BE-XL
Symbole/00016411_mei_in_0k_0k.gif  Felt ring seals
Symbole/00016412_mei_in_0k_0k.gif  Labyrinths with relubrication facility
Symbole/00016413_mei_in_0k_0k.gif  End cap
Symbole/00016414_mei_in_0k_0k.gif  Oil feed ducts
Symbole/00016415_mei_in_0k_0k.gif  Oil grooves
Symbole/00016416_mei_in_0k_0k.gif  Flake graphite
Solid lubricant with layered grid structure. Suitable for dry running or as active ingredient in oils or greases. Graphite absorbs moisture. Graphite displays its best lubrication characteristics in damp environments.
cast iron housing

 

imageref_21727303819_All.gif

 
 

Axial location – bearings with tapered bore

Location by means of locknut and tab washer

 

If a bearing with a tapered bore is mounted directly on a tapered shaft journal, the bearing can be axially located with ease using a locknut and tab washer ➤ Figure 15.

 
   

Figure 15
Spherical roller bearing
See Rolling bearing
with tapered bore, mounted directly on the tapered shaft journal

Symbole/00016410_mei_in_0k_0k.gif  Tapered journal with fixing thread
Symbole/00016411_mei_in_0k_0k.gif  Locknut
Symbole/00016412_mei_in_0k_0k.gif  Tab washer

 

imageref_22760620299_All.gif

 
 

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

Mounting can be carried out quickly and reliably by means of wrench sets from Schaeffler

 

The location of spherical roller bearings by means of adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve or withdrawal sleeve on a smooth or stepped cylindrical shaft is an easy-to-fit and operationally reliable method ➤ section and ➤ Figure 16. It requires no additional means of retention on the shaft. The bearings can be positioned at any point on smooth shafts. Axial load
Force acting in the direction of the shaft.
carrying capacity of such bearing arrangements ➤ section . Further information on adapter
An accessory mounted on another element, for example a lubrication adapter
sleeves ➤ link .

 

Mounting of the adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve and withdrawal sleeve

 

While the bearing is being slid onto the adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve, the withdrawal sleeve is pressed into the tapered bearing bore until the required reduction in radial internal clearance is achieved. The position is fixed by means of a locknut. The inner ring is abutted against a shoulder on the shaft ➤ Figure 16. The required adapter
An accessory mounted on another element, for example a lubrication adapter
sleeves or withdrawal sleeves must be stated additionally in the order ➤ section and ➤ dimension table.

 
 

   

Figure 16
Location of spherical roller bearings by means of adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve or withdrawal sleeve

Symbole/00016410_mei_in_0k_0k.gif  Bearing with adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve, adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve nut (shaft nut) and tab washer
Symbole/00016411_mei_in_0k_0k.gif  Bearing with withdrawal sleeve, locknut and tab washer, abutment of the inner ring against a shaft shoulder

 

imageref_22760650763_All.gif

 
 

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

imageref_17757187211_All.gif   If an adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve connection is used and it is expected that the frictional forces of the sleeve cannot reliably support high axial forces, the bearing inner ring can be abutted by means of a support ring against a shaft shoulder ➤ Figure 17. Axial guidance forces in the opposing direction are supported by means of form fit. The mounting dimensions
Dimensions such as shaft diameter or hole distances, for example of bearings and guideways, which influence fitting for correct functioning
of the support ring in the product tables must be observed ➤ dimension table.
 
 

   

Figure 17
Location of a spherical roller bearing
See Rolling element
by means of adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve and support ring on a stepped shaft

Symbole/00016410_mei_in_0k_0k.gif  Spherical roller bearing
Symbole/00016411_mei_in_0k_0k.gif  Adapter sleeve
Symbole/00016412_mei_in_0k_0k.gif  Support ring
Symbole/00016413_mei_in_0k_0k.gif  Locknut with tab washer

 

imageref_22760653835_All.gif

 
 

Location of bearings with a tapered bore on a tapered shaft

Axial location by means of fixing nut, ring nut and locking pin

 

Where shafts must support high torques, it is not always permissible to cut the thread for the fixing nut of the bearing into the shaft due to the notch effect. In this case, a slot with well rounded transitions is grooved into the shaft. A split ring with an external thread is inserted in the slot and secured by means of a feather key or pin. The fixing nut is screwed onto the ring nut and secured ➤ Figure 18.

 
 

   

Figure 18
Location of a spherical roller bearing
See Rolling element
on a tapered shaft

Symbole/00016410_mei_in_0k_0k.gif  Spherical roller bearing
Symbole/00016411_mei_in_0k_0k.gif  Fixing nut with retaining bracket
Symbole/00016412_mei_in_0k_0k.gif  Retaining pin
Symbole/00016413_mei_in_0k_0k.gif  Ring nut

 

imageref_22760647691_All.gif

 
 

Dimensional, geometrical and running accuracy
Measured in terms of radial runout and axial runout, due to the dimensional and geometrical tolerances of the bearing in motion, defined according to DIN
of cylindrical bearing seats

A minimum of IT6 should be provided for the shaft seat and a minimum of IT7 for the housing
See Mounting dimenstions
seat

 

The 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 cylindrical bearing seat on the shaft and in the housing
See Mounting dimenstions
should correspond to the 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 bearing used. For spherical roller bearings with the tolerance class Normal, the shaft seat should correspond to a minimum of standard tolerance grade IT6 and the housing
See Mounting dimenstions
seat to a minimum of IT7. Guide values for the geometrical and positional tolerances
See
Running accuracy
Dimensional accuracy
of bearing seating surfaces ➤ Table 13, tolerances t1 to t3 in accordance with    ➤ Figure. Numerical values for IT grades ➤ Table 14.

 
   
Table 13
Guide values for the geometrical and positional tolerances
See
Running accuracy
Dimensional accuracy
of bearing seating surfaces
 

Bearing
tolerance class
Bearing seating surface
Standard tolerance grades to ISO 286-1
(IT grades)
to ISO 492
to DIN 620
Diameter tolerance
Roundness tolerance
Parallelism tolerance
Total axial runout tolerance of abutment shoulder
t1
t2
t3
Normal
PN (P0)
Shaft
IT6 (IT5)
Circumferential load
IT4/2
Circumferential load
IT4/2
IT4
Point load
IT5/2
Point load
IT5/2
Housing
IT7 (IT6)
Circumferential load
IT5/2
Circumferential load
IT5/2
IT5
Point load
IT6/2
Point load
IT6/2
5
P5
Shaft
IT5
Circumferential load
IT2/2
Circumferential load
IT2/2
IT2
Point load
IT3/2
Point load
IT3/2
Housing
IT6
Circumferential load
IT3/2
Circumferential load
IT3/2
IT3
Point load
IT4/2
Point load
IT4/2


 
   
Table 14
Numerical values for ISO standard tolerances
See
Running accuracy
Dimensional accuracy
(IT grades) to ISO 286-1:2010
 

IT grade
Nominal dimension in mm
over
18
30
50
80
120
180
250
315
incl.
30
50
80
120
180
250
315
400
Values in μm
IT2

   
2,5
2,5
3
4
5
7
8
9
IT3

   
4
4
5
6
8
10
12
13
IT4
  6
7
8
10
12
14
16
18
IT5
  9
11
13
15
18
20
23
25
IT6
  13
16
19
22
25
29
32
36
IT7
  21
25
30
35
40
46
52
57
continued ▼

 
   
Table 15
Numerical values for ISO standard tolerances
See
Running accuracy
Dimensional accuracy
(IT grades) to ISO 286-1:2010
 

IT grade
Nominal dimension in mm
over
400
500
630
800
1 000
1 250
1 600
incl.
500
630
800
1 000
1 250
1 600
2 000
Values in μm
IT2

   
10
11
13
15
18
21
25
IT3

   
15
16
18
21
24
29
35
IT4
  20
22
25
28
33
39
46
IT5
  27
32
36
40
47
55
65
IT6
  40
44
50
56
66
78
92
IT7
  63
70
80
90
105
125
150
continued ▲

 
 

Roughness of cylindrical bearing seating surfaces

Ra must not be too high

 

The roughness
Regular or irregular repeat deviation from an ideal geometric profile.
of the bearing seats must be matched to the tolerance class of the bearings. The mean roughness
Regular or irregular repeat deviation from an ideal geometric profile.
value Ra must not be too high, in order to maintain the interference loss within limits. The shafts must be ground, while the bores must be precision turned. Guide values as a function of the IT grade of bearing seating 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
➤ Table 16.

 
   
Table 16
Roughness values for cylindrical bearing seating surfaces – guide values
 

Nominal diameter
of the bearing seat
d (D)
Recommended mean roughness
Regular or irregular repeat deviation from an ideal geometric profile.
value
for ground bearing seats
Ramax
mm
μm
Diameter tolerance (IT grade)
over
incl.
IT7
IT6
IT5
IT4
- 80
1,6
0,8
0,4
0,2
80
500
1,6
1,6
0,8
0,4
500
1 250
3,21)
1,6
1,6
0,8

 
 
______
 1    For the mounting of bearings using the hydraulic method, a value Ra = 1,6 μm must not be exceeded
 
 

Tolerances for tapered bearing seats

Specifications for tapered bearing seats

 

For bearings located directly on a tapered shaft journal, the data are in accordance with   ➤ Figure.

 
 

Mounting dimensions for the contact 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 bearing rings

The contact 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
for the rings must be of sufficient height

 

The mounting dimensions
Dimensions such as shaft diameter or hole distances, for example of bearings and guideways, which influence fitting for correct functioning
of the shaft and housing
See Mounting dimenstions
shoulders, and spacer rings etc., must ensure that the contact 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
for the bearing rings are of sufficient height. However, they must also reliably prevent rotating parts of the bearing from grazing stationary parts. Proven mounting dimensions
Dimensions such as shaft diameter or hole distances, for example of bearings and guideways, which influence fitting for correct functioning
for the radii and diameters of the abutment shoulders are given in the product tables. These dimensions are limiting dimensions (maximum or minimum dimensions); the actual values should not be higher or lower than specified.

 
 

Suitable bearing housings for spherical roller bearings

A large range of housings is available

 

For economical, operationally reliable and easily interchangeable 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
units, the spherical roller bearings can also be combined with Schaeffler bearing housings ➤ Figure 19. These easy-to-fit units fulfil all of the requirements for modern machine and plant designs with favourable maintenance-related characteristics.

 
imageref_19614046091_en.gif   Due to the large number of application areas, an extensive range of bearing housings is available for bearings with cylindrical and tapered bores. These include split and unsplit plummer block housings, take-up housings, flanged housings and housings for specific industrial and railway applications. Detailed information on bearing housings can be found in publication GK 1 http://www.schaeffler.de/std/1D54. This book can be ordered from Schaeffler.  
   

Figure 19
Split plummer block housing SNS with a spherical roller bearing

Symbole/00016410_mei_in_0k_0k.gif  Split plummer block housing SNS
Symbole/00016411_mei_in_0k_0k.gif  Spherical roller bearing

 

imageref_21479242251_All.gif

 
 

Mounting and dismounting

 
imageref_17757187211_All.gif   The mounting and dismounting options for spherical roller bearings, by thermal, hydraulic or mechanical methods, must also be taken into consideration in the design of the bearing position. Example ➤ Figure 20.  
   

Figure 20
Mounting of large bearings with a hydraulic nut

Symbole/00016410_mei_in_0k_0k.gif  Spherical roller bearing
See Rolling bearing
with tapered bore mounted directly on the tapered shaft journal
Symbole/00016411_mei_in_0k_0k.gif  Hydraulic nut

 

imageref_9007205750671371_All.gif

 

Ensure that the bearings are not damaged during mounting

 

Spherical roller bearings are not separable. In the mounting of non‑separable bearings, the mounting forces must always be applied to the bearing ring with a tight fit.

 
 

Mounting of bearings with a tapered bore

Suitable methods

 

Bearings with a tapered bore are mounted with a tight fit on the shaft or adapter
An accessory mounted on another element, for example a lubrication adapter
and withdrawal sleeve ➤ Figure 15, ➤ Figure 16 and ➤ Figure 17. The measurement of the reduction in radial internal clearance or of the axial drive-up distance of the inner ring on the tapered bearing seat serves as an indication of the tight fit.

 
 

Measuring the reduction in radial internal clearance during mounting of the bearings

The measurement is usually carried out with a feeler gauge

 

The reduction in radial internal clearance is the difference between the radial internal clearance before mounting and the bearing clearance
See Bearing internal clearance
after mounting of the bearing ➤ Figure 21, ➤ Table 17 and ➤ Table 18. The radial internal clearance must be measured first. During pressing on, the radial clearance (bearing clearance) must be checked until the necessary reduction in the radial internal clearance and thus the required tight fit is achieved.

 
imageref_17757187211_All.gif   If the values in the table are observed, secure radial location of the bearings will be achieved, i.e. the inner ring will be prevented from creeping under load. However, the mounting method does not ensure that an operating clearance
The amount by which the bearing rings in a fitted bearing can be moved in the radial or axial direction from one extreme position to the other.
which is appropriate to the application is also achieved simultaneously. In order to select the requisite internal clearance class, other factors influencing the operating clearance, such as the temperature difference between the inner and outer ring and the housing
See Mounting dimenstions
bore tolerance for example, must be taken into consideration.
 
imageref_18348417035_All.gif   If there is any uncertainty regarding the selection of an internal clearance class for a specific application, please consult Schaeffler.  
 

   

Figure 21
Reduction in radial internal clearance

sa =  axial press-on distance (axial drive-up distance of the bearing)
sr =  radial internal clearance before mounting
sr1 = radial internal clearance after mounting
sr – sr1 = reduction in radial internal clearance
Symbole/00016410_mei_in_0k_0k.gif  Before mounting
Symbole/00016411_mei_in_0k_0k.gif  After mounting

 

imageref_21406641419_All.gif

 
   
Table 17
Reduction in radial internal clearance in mounting of spherical roller bearings with tapered bore
 

Nominal
bore diameter
Radial internal clearance
before mounting in accordance
with DIN 620-4:2004 (ISO 5753-1:2009)
Reduction in radial internal clearance during mounting1)
d
CN
(Group N)
C3
(Group 3)
C4
(Group 4)
mm
mm
mm
mm
mm
over
incl.
min.
max.
min.
max.
min.
max.
min.
max.
24
30
0,03
0,04
0,04
0,055
0,055
0,075
0,015
0,02
30
40
0,035
0,05
0,05
0,065
0,065
0,085
0,02
0,025
40
50
0,045
0,06
0,06
0,08
0,08
0,1
0,025
0,03
50
65
0,055
0,075
0,075
0,095
0,095
0,12
0,03
0,04
65
80
0,07
0,095
0,095
0,12
0,12
0,15
0,04
0,05
80
100
0,08
0,11
0,11
0,14
0,14
0,18
0,045
0,06
100
120
0,1
0,135
0,135
0,17
0,17
0,22
0,05
0,07
120
140
0,12
0,16
0,16
0,2
0,2
0,26
0,065
0,09
140
160
0,13
0,18
0,18
0,23
0,23
0,3
0,075
0,1
160
180
0,14
0,2
0,2
0,26
0,26
0,34
0,08
0,11
180
200
0,16
0,22
0,22
0,29
0,29
0,37
0,09
0,13
200
225
0,18
0,25
0,25
0,32
0,32
0,41
0,1
0,14
225
250
0,2
0,27
0,27
0,35
0,35
0,45
0,11
0,15
250
280
0,22
0,3
0,3
0,39
0,39
0,49
0,12
0,17
280
315
0,24
0,33
0,33
0,43
0,43
0,54
0,13
0,19
315
355
0,27
0,36
0,36
0,47
0,47
0,59
0,15
0,21
355
400
0,3
0,4
0,4
0,52
0,52
0,65
0,17
0,23
400
450
0,33
0,44
0,44
0,57
0,57
0,72
0,2
0,26
450
500
0,37
0,49
0,49
0,63
0,63
0,79
0,21
0,28
500
560
0,41
0,54
0,54
0,68
0,68
0,87
0,24
0,32
560
630
0,46
0,6
0,6
0,76
0,76
0,98
0,26
0,35
630
710
0,51
0,67
0,67
0,85
0,85
1,09
0,3
0,4
710
800
0,57
0,75
0,75
0,96
0,96
1,22
0,34
0,45
800
900
0,64
0,84
0,84
1,07
1,07
1,37
0,37
0,5
900
1 000
0,71
0,93
0,93
1,19
1,19
1,52
0,41
0,55
1 000
1 120
0,78
1,02
1,02
1,3
1,3
1,65
0,45
0,6
1 120
1 250
0,86
1,12
1,12
1,42
1,42
1,8
0,49
0,65
1 250
1 400
0,94
1,22
1,22
1,55
1,55
1,96
0,55
0,72

 
 
______
 1    Valid only for solid steel shafts and hollow shafts with a bore no larger than half the shaft diameter. The following applies: bearings with a radial internal clearance before mounting in the upper half of the tolerance range are mounted using the larger value for the reduction in radial internal clearance, while bearings in the lower half of the tolerance range are mounted using the smaller value for the reduction in radial internal clearance.
 
 

Measuring the axial drive-up distance of the inner ring

   

Measuring the axial drive-up distance of the inner ring

Table 18
Axial drive-up distance of the inner ring in spherical roller bearings with a tapered bore
 

Nominal bore diameter
Drive-up distance on taper 1:121)
Drive-up distance on taper 1:301)
Nominal bore diameter
Minimum radial internal clearance required after mounting, control value
d
Shaft
Sleeve
Shaft
Sleeve
d
With CN (Group N)
With C3 (Group 3)
With C4 (Group 4)
mm
mm
mm
mm
mm
mm
mm
mm
mm
over
incl.
min.
max.
min.
max.
min.
max.
min.
max.
over
incl.
min.
min.
min.
24
30
0,3
0,35
0,3
0,4
- - - - 24
30
0,015
0,02
0,035
30
40
0,35
0,4
0,35
0,45
- - - - 30
40
0,015
0,025
0,04
40
50
0,4
0,45
0,45
0,5
- - - - 40
50
0,02
0,03
0,05
50
65
0,45
0,6
0,5
0,7
- - - - 50
65
0,025
0,035
0,055
65
80
0,6
0,75
0,7
0,85
- - - - 65
80
0,025
0,04
0,07
80
100
0,7
0,9
0,75
1
1,7
2,2
1,8
2,4
80
100
0,035
0,05
0,08
100
120
0,7
1,1
0,8
1,2
1,9
2,7
2
2,8
100
120
0,05
0,065
0,1
120
140
1,1
1,4
1,2
1,5
2,7
3,5
2,8
3,6
120
140
0,055
0,08
0,11
140
160
1,2
1,6
1,3
1,7
3
4
3,1
4,2
140
160
0,055
0,09
0,13
160
180
1,3
1,7
1,4
1,9
3,2
4,2
3,3
4,6
160
180
0,06
0,1
0,15
180
200
1,4
2
1,5
2,2
3,5
4,5
3,6
5
180
200
0,07
0,1
0,16