How to adjust the clearance of a four-point contact ball bearing
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I would like to ask the experts: for the four-point contact ball bearings of the QJ series, how should the axial play be adjusted during installation? Or is adjustment even necessary? Can the inner ring simply be tightened with dual-threaded screws after it is installed on the shaft? Thank you!
This post was last edited by parapet on 2020-7-29 09:08. Angular contact ball bearings can be used as a reference; whether adjustments are necessary depends on the design intent. If the direction of the axial force changes, for example from left to right, the stiffness of the four-point bearing should not be sufficient, resulting in some amount of play.
Let me tell you a method you can use even after retirement: feel the shaft while the lock cap is in place. If you feel that the bearings are tight, it means they are in the correct position. Remember to loosen the lock cap by one-quarter turn; if turning the shaft feels easier now than before it was locked, then that’s fine.
If there are requirements for installation instructions, check those; if not, consult the equipment manufacturer. As a last resort, refer to the \"Mechanical Design Handbook\". For reference.