Deformation by Misassembling Causes and Countermeasures

How:

1. Incorrect mounting method and mounting tool defect may lead to an overload force between bearing rings and rolling elements. This will cause a certain indentation on bearing raceway and rolling elements surface.

Indentations resulting from misassembling on bearing raceway and rolling elements surface:

Indentations on bearing raceway and rolling elements surface

Roundness measurement on bearing raceway (edge)
(Figure on the left side for outer ring and right one for inner ring.)

Countermeasures:

1. 1. Use appropriate methods for mounting bearings.
2. 2. Use appropriate tools as required.