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Abutment and fillet dimensions

The shoulders on adjacent machine parts must be designed in such a way that the required axial support of the bearing rings is guaranteed.

The bearing rings must contact adjacent parts with their side faces only.

The bearing chamfers must not contact the shoulder fillet radii of shaft or housing shoulders.

Therefore, the largest fillet radius (rg) must be kept smaller than the minimum chamfer on the bearing rings (rs) given in the product tables. 

Recommendations for the dimensions of adjacent parts are given in DIN 5418.

Cylindrical roller bearings subjected to high thrust loads require a support of the bearing flanges over 50 % of their radial section or greater.

The adjacent dimensions can be calculated as follows:

For shaft shoulders:
dwmin= (F + d1) / 2
For housing shoulders:
Dwmin= (E + D1) / 2
 
Where:
 
dwmin = minimum shaft shoulder diameter
F = inner ring raceway diameter, see product tables
d1 = outer diameter of inner ring shoulder, see product tables
Dwmin = minimum housing shoulder diameter
E = outer ring raceway diameter, see product tables
D1 = inner diameter of outer ring shoulder, see product tables

The shoulders on adjacent machine parts must be designed in such a way that the required axial support of the bearing rings is guaranteed.

The bearing rings must contact adjacent parts with their side faces only.

The bearing chamfers must not contact the shoulder fillet radii of shaft or housing shoulders.

Therefore, the largest fillet radius (rg) must be kept smaller than the minimum chamfer on the bearing rings (rs) given in the product tables. 

Recommendations for the dimensions of adjacent parts are given in DIN 5418.

Cylindrical roller bearings subjected to high thrust loads require a support of the bearing flanges over 50 % of their radial section or greater.

The adjacent dimensions can be calculated as follows:

For shaft shoulders:
dwmin= (F + d1) / 2
For housing shoulders:
Dwmin= (E + D1) / 2
 
Where:
 
dwmin = minimum shaft shoulder diameter
F = inner ring raceway diameter, see product tables
d1 = outer diameter of inner ring shoulder, see product tables
Dwmin = minimum housing shoulder diameter
E = outer ring raceway diameter, see product tables
D1 = inner diameter of outer ring shoulder, see product tables
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NBI Bearings Europe, S.A.
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