Schaeffler Product catalogue - medias
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Spherical roller bearings
Features
 

Spherical roller bearings are double row, self-retaining units comprising solid outer rings with a concave raceway, solid inner rings and barrel rollers with cages. The inner rings have cylindrical or tapered bores.

 
 

The symmetrical barrel rollers
Barrel-shaped, tapered or cylindrical rolling elements
orient themselves freely on the concave outer ring raceway. As a result, shaft flexing and misalignment of the bearing seats are compensated, see link.

 
   
 

Many sizes of spherical roller bearings are of an X-life design. These bearings have improved kinematics and optimised surfaces, are made from higher performance materials and do not have a rigid central rib. As a result, the basic dynamic load
The term dynamic indicates that the operating condition is with the bearing rotating. This is not a variable load.
rating and, under identical operating conditions, 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
of the bearings is significantly improved. In certain applications, this means that a smaller bearing arrangement can be designed.

 
 

X-life spherical roller bearings have the suffix
Addition to the designation, consisting of letters and/or numbers, for example, it may indicate variants of a series
E1 and are indicated in the dimension tables.

 
   

Radial and axial load
Force acting in the direction of the shaft.
capacity

 

Spherical roller bearings can support axial forces in both directions and high radial forces. 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, are also suitable for the heaviest loads.

 
 

Due to the narrow osculation
Ratio between raceway radius and ball diameter
between the rollers
Barrel-shaped, tapered or cylindrical rolling elements
and raceways, uniform stress distribution is achieved in the bearing.

 
   

Compensation of
angular misalignments

 

Spherical roller bearings compensate for angular misalignments. The permissible adjustment angle is stated for loads P < 0,1 · Cr, see table.

 
 

These adjustment angles are permissible if:

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

Reduced adjustment angle

 

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 is smaller. If such applications are present, please contact us.

 
   
Table 1
Adjustment angle
 

Series
Adjustment angle for
P < 0,1 · Cr
°
213..-E1, 222, 222..-E1
230, 230..-E1(E1A), 239, 240, 240..-E1, 241..-E1
1,5
223, 223..-E1, 231, 231..-E1(E1A),
232, 232..-E1(E1A), 233..-A, 241
2

 
   

Bearings with cylindrical bore

 

Spherical roller bearings of all series are available with inner rings having a cylindrical bore.

 
   

Bearings with tapered bore

 

Spherical roller bearings are also available, with the exception of series 233..-A, with inner rings having a tapered bore.

 
 

Bearings with the suffix
Addition to the designation, consisting of letters and/or numbers, for example, it may indicate variants of a series
K have a bore taper 1:12, bearings of series 240 and 241 have a bore taper 1:30 and the suffix
Addition to the designation, consisting of letters and/or numbers, for example, it may indicate variants of a series
K30.

 
   

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

 

Bearings with a tapered bore are also available with an adapter
An accessory mounted on another element, for example a lubrication adapter
sleeve, locknut and tab washer or with a withdrawal sleeve.

 
 

Adapter and withdrawal sleeves must be ordered in addition to the bearing.

 
   

Sealing

 

We can by agreement supply sealed and greased bearings.

 
   

Lubrication

 

Open spherical roller bearings can be lubricated with oil
Fluid lubricant with a mineral oil and/or synthetic oil base, usually with active ingredients or additives.
or grease.

 
 

Most spherical roller bearings have a circumferential groove and three lubrication holes in the outer ring for lubrication. In bearings of series 239 with an outside diameter < 320 mm, this is indicated by the suffix
Addition to the designation, consisting of letters and/or numbers, for example, it may indicate variants of a series
S.

 
 

Bearings of series 213 with a bore diameter up to 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.

 
   
achtung  

If shafts with a vertical axis are supported using spherical roller bearings, particular attention must be paid to ensuring the reliable provision of lubricant. In such cases, oil
Fluid lubricant with a mineral oil and/or synthetic oil base, usually with active ingredients or additives.
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
should be used.

 
   

Operating temperature

 

Spherical roller bearings are dimensionally stable up to +200 °C. Bearings with metal cages can be used at operating temperatures from –30 °C to +200 °C.

 
   
achtung  

Bearings with cages made from glass fibre reinforced polyamide are suitable up to +120 °C.

 
   

Cages

 

The standard cages for spherical roller bearings are shown in the table and link.

 
 

Spherical roller bearings with a rigid central rib on the inner ring (design without suffix
Addition to the designation, consisting of letters and/or numbers, for example, it may indicate variants of a series
E1) have solid cages or sheet metal cages made from brass. Bearings with sheet metal cages do not have a cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
suffix.

 
 

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, the solid brass cages are guided on the inner ring while, in bearings with the suffix
Addition to the designation, consisting of letters and/or numbers, for example, it may indicate variants of a series
MA, they are guided on the outer ring, Figure 2. Bearings with the suffix
Addition to the designation, consisting of letters and/or numbers, for example, it may indicate variants of a series
M have a roller-guided solid brass cage, Figure 2.

 
   

X-life bearings

 

Bearings of series 213..-E1, 222..-E1, 223..-E1, 240..-E1 and 241..-E1 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 guidance ring in the outer or inner ring, Figure 1.

 
 

In bearings of series 223..-E1, 240..-E1 and 241..-E1, all sheet steel cages have special protection
Coatings and layers on metallic materials to prevent damage from corrosion.
against wear
Undesirable change to dimensions and/or surfaces of materials due to frictional forces
by means of surface hardening or coating.

 
 

The other bearings of E1 design have solid cages made from ­glass fibre reinforced polyamide 66 or solid brass cages (suffix TVPB or M), Figure 2.

 
   
achtung  

Check the chemical resistance of polyamide to synthetic 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.
and lubricants with EP additives.

 
 

Aged oil 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 plastic cages at high temperatures.

 
 

The oil change intervals must be observed.

 
   
Table 2
Cage and bore code
 

Series
Sheet metal cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
made from
Steel
Brass
Guidance on
Guidance on
outer ring
inner ring
inner ring
Bore code
213..-E1
08 to 18
- -
222
- - -
222..-E1
up to 36
- -
223
- - -
223..-A (T41A)
- - -
223..-E1
up to 30
- -
223..-E1 (T41A, T41D) up to 30
- -
230
- - -
230..-E1
- - -
230..-E1A
- - -
231
- - -
231..-E1
- - -
231..-E1A
- - -
232
- - -
232..-E1
- - -
232..-E1A
- - -
233..-A (T41A)
- - -
239
- - -
240
- - -
240..-E1
- up to 40
-
241
- - 40 to 88
241..-E1
- up to 38
-

 
   

Figure 1
Sheet metal cages
made from steel or brass

Medias/00016410_mei_in_0k_0k.gif Sheet steel cages
Medias/00016411_mei_in_0k_0k.gif Sheet brass cage
Medias/00016412_mei_in_0k_0k.gif Cage guidance on outer ring
Medias/00016413_mei_in_0k_0k.gif Cage guidance on inner ring

 

imageref_765311755_All.gif

 
   
Table 3
Cage and bore code
continued
 

Series
Solid cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
made from
Polyamide
Brass
Guidance on inner ring TVPB
Guidance by rollers
Guidance on
inner ring
outer ring
M
MB
MA
Bore code
213..-E1
04 to 07
19 to 22
- - -
222
- - from 38
-
222..-E1
- - - -
223
- - from 32
-
223..-A (T41A)
- - - from 32
223..-E1
- - - -
223..-E1 (T41A, T41D) - - - -
230
- - from 44
-
230..-E1
up to 40
- - -
230..-E1A
- up to 40
- -
231
- - from 40
-
231..-E1
up to 38
- - -
231..-E1A
- up to 38
- -
232
- - from 38
-
232..-E1
up to 36
- - -
232..-E1A
- up to 36
- -
233..-A (T41A)
- - - from 20
239
- - from 36
-
240
- - from 44
-
240..-E1
- - - -
241
- - from 92
-
241..-E1
- - - -

 
   

Figure 2
Solid cages
made from polyamide or brass

Medias/00016410_mei_in_0k_0k.gif Solid polyamide cage
Medias/00016411_mei_in_0k_0k.gif Solid brass cages
Medias/00016412_mei_in_0k_0k.gif Cage guidance on inner ring
Medias/00016413_mei_in_0k_0k.gif Cage guided by rollers
Medias/00016414_mei_in_0k_0k.gif Cage guidance on outer ring

 

imageref_765313931_All.gif

 
   

Suffixes

 

Suffixes for available designs: see table.

 
   
Table 4
Available designs
 

Suffix
Description
Design
A
Modified internal construction
Standard
B
Modified internal construction
E1
Increased capacity design
K
Tapered bore, taper 1:12
K30
Tapered bore, taper 1:30
M
Solid brass cage, guided by rollers
MA
Solid brass cage, guidance on outer ring
MB
Solid brass cage, guidance on inner ring
S
Lubrication groove and lubrication holes in outer ring
T41A
For oscillating load with restricted diameter tolerances, radial internal clearance C4
T41D
For oscillating load with restricted diameter tolerances,
radial internal clearance C4, bore with thin layer chromium coating
TVPB
Solid window cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
made from glass fibre reinforced polyamide, guidance on inner ring

 
   
  
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