Recess mounting

For fixed GR bearings a shaft recess or some form of abutment is required if the axial load exceeds 50% C_a or a combination of axial loading and one or more of the following: shock loads; vertical shafts; fluctuating temperatures over 212F. The recess width is calculated by starting with the inner race width from the catalog.

Using the tolerance table from the end of this chapter, add D11 tolerances.

Both tolerances will be + dimensions, indicating that the recess must be wider than the inner race. For 03 Series bearings refer to this catalog.

Retaining rings

If a recess is not practical another option is to use retaining rings. Corresponding grooves are machined into the shaft using the same spacing between rings as the width of the recess (dimension b) from chart on the Bearing geometry page.

These rings are placed in the grooves on either side of the inner race and will prevent axial movement of the shaft.

Make sure that the retaining rings do not interfere with the seals. In this case, the seals and bearing will have the same bore size.