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Ball Screw RCA: Breakage of Shaft End

2020-07-21T04:16:42+00:00Jul 21, 2020

Damage Condition

Shaft end (mainly bearing journal) broke completely.

Possible Causes Rotational bending fatigue caused by misalignment of screw shaft (the bearing journal was forced to bend because of eccentricity between the ball screw thread and the bearing journal) Countermeasures Improve assembly accuracy of the ball screw Breakage of Shaft End

Part: Screw shaft
Symptom: Shaft end broke completely
Cause: Broken bearing journal due to rotating bending fatigue

Source: NSK

By Cindy · Bearing design & application specialists

This article is prepared by the SINO BEARINGS (Sinoti Tech) engineering team, based on published bearing standards (ABEC / ISO P0–P2), material datasheets, and field application experience across industrial, food, medical and aerospace uses. For manufacturer background, certifications and facilities, see our About page.

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