Schaeffler Product catalogue - medias
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Axial cylindrical roller bearings, roller and cage assemblies, axial bearing washers
Design and safety guidelines
   

Design of adjacent parts

 

Axial bearing washers must always be fully supported on their entire abutment surface.

 
 

The abutment shoulders should be rigid, flat and perpendicular to the axis of rotation.

 
 

The radial cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
guidance 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
must be precision machined and wear-resistant (Rz4 (Ra0,8)).

 
   
achtung  

If axial cylindrical roller and cage
The part of a rolling bearing which separates, retains and, where necessary, guides the rolling elements
assemblies run directly on the adjacent construction, the running 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
must be produced as rolling bearing
Ready-to-fit machine element, often defined in standards, for transmitting movements, loads and tilting moments with a high level of efficiency; rolling bearings consist of rolling elements, cages and raceways on rings, guideways or carriages as well as lubricant and, if necessary, seals and accessories
raceways.

 
 

The surface hardness
Resistance of a body to indentation by another body; hardness is either intrinsic or is achieved by heat treatment processes (steel) and/or thermochemical diffusion; for rolling bearings, hardness is measured in Rockwell (HRC) or Vickers (HV)
of the raceway must be 670 HV + 170 HV, the hardening depth CHD or SHD must be sufficiently large.

 
   

Tolerances for shafts
and housing
See Mounting dimenstions
bores

 

Tolerances for shafts and housing
See Mounting dimenstions
bores: see table.

 
   
Table 1
Shaft and housing
See Mounting dimenstions
bore tolerances
 

Bearing component
Tolerance for
Shaft
Bore
K811, K812,
K893, K894
Guided on shaft
h8
-
GS811, GS812, GS893, GS894
- - H9
WS811, WS812, WS893, WS894
- h8
-
LS
As housing
See Mounting dimenstions
locating washer
Clear of shaft
H9
As shaft locating washer
h8
Clear of housing

 
   
   

Limiting speed

   
achtung  

The limiting speeds nG given in the product tables are valid for oil
Fluid lubricant with a mineral oil and/or synthetic oil base, usually with active ingredients or additives.
lubrication. With grease
See
Lubricant
Grease cartridge
Fatty acids
lubrication, the permissible value is 25% of the value given in the table.

 
   

Minimum axial load

 

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

See Contact surface
Fa min
according to the formula must be applied.

 
   
 

imageref_30785675_All.gif

 
 
Fa min
 N
Minimum axial load
ka
Factor for determining the minimum load, see table
C0a
 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
n
 min–1
Speed.
 
   
Table 2
Factor ka
 

Series
Factor
ka
K811
1,4
K812
0,9
K893
0,7
K894
0,5

 
   
   

Orientation of washers

   
achtung  

The axial bearing washers must be fitted with the raceway side facing the rolling elements.

 
 

On housing locating washers, the raceway side is indicated by the smaller chamfer on the outside diameter.

 
 

On shaft locating washers, the raceway side is indicated by the smaller chamfer on the bore diameter.

 
   
  
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