In many applications, it is frequently the case that one of the main dimensions of the Schaeffler rolling bearing is fixed by the overall design of the machine or piece of equipment. Due to the strength specifications of the shaft, this is generally the bore diameter of the bearing.
For small shaft diameters, suitable bearings are ball bearings - especially FAG deep groove ball bearings - and INA needle roller bearings. Where large diameters are present, the bearings available are cylindrical, tapered, spherical and toroidal roller bearings, as well as deep groove ball bearings, but not excluding needle roller bearings.
A load carrying capacity of approximately the same magnitude can be achieved both with bearings that are narrow and have a large outside diameter and also with bearings that are wide and have a smaller outside diameter.
Cylindrical roller bearings with approximately comparable basic load rating C0
Schaeffler bearings with small cross-sectional height
If the design envelope is restricted in a radial direction - for example in high performance gearboxes for vehicles - bearings with a small cross sectional height such as roller and INA needle roller and cage assemblies, drawn cup needle roller bearings with or without an inner ring, are particularly suitable. These Schaeffler bearings have high radial load carrying capacity due to the line contact with low section height.
1, Needle roller and cage assembly
2, Drawn cup needle roller bearing with open ends
3, Needle roller bearing without inner ring
4, Needle roller bearing with inner ring
Schaeffler bearings with small axial design envelope and combined load
If the design envelope is small in an axial direction, the Schaeffler bearings suitable for bearing positions subjected to radial and axial load are certain series of cylindrical roller bearings - e.g. semi-locating bearings NJ in conjunction with FAG deep groove ball bearings or INA combined needle roller bearings
Semi-locating bearing for supporting axial forces in one direction in conjunction with a deep groove ball bearing
1, Cylindrical roller bearing NJ (semi-locating bearing)
2, Deep groove ball bearing (locating bearing, functioning here as a semi-locating bearing)
Combined needle roller bearings for supporting high radial forces and axial forces in one or both directions
1, Needle roller/axial deep groove ball bearing, without inner ring, without end cap for axial forces in one direction
2, Needle roller/angular contact ball bearing with inner ring, for axial forces in both directions
Schaeffler bearings with pure axial load carrying capacity
If Schaeffler bearing arrangement is under axial load only, suitable bearings are axial needle roller and axial cylindrical roller and cage assemblies, axial needle roller and axial cylindrical roller bearings and axial deep groove ball bearings with a small axial section height
Axial bearings - comparison of cross-sections
1, Axial needle roller and cage assembly
2, Axial needle roller bearing
3, Axial deep groove ball bearing
4, Axial cylindrical roller bearing