Installing the bearings on the shaft or housing, when determining the position in the axial direction, the shaft retaining shoulder or housing inner diameter retaining shoulder which is in contact with the bearing side must be at a right angle to the axis. The roundness of the transition angle of the shaft and housing shall not interfere with the chamfered part of the shaft, so the ra size of the transition angle shall not exceed the r size of the bearing chamfering square or minimum size of r.

The height of the shaft block shoulder and the housing block shoulder of the centripetal bearing shall be in full contact with the side of the ring.And the minimum height on the disassembly tool can be stuck is according to table 1.