Replacing a Worn Slewing Bearing With No Original Drawing
Sep 23, 2026
Technical Guide
Replacing a Worn Slewing Bearing With No Original Drawing
How to measure a used ring and turn those measurements into a dimensionally matched replacement
Guide from Anhui Yuanfeng Slewing Rings Co., Ltd.
Quick Answer
When the original drawing of a slewing bearing is lost, a replacement can still be manufactured from careful measurements of the worn ring. Outer diameter, bore, ring height, bolt hole pattern, and gear data (if the ring has teeth) are normally enough for a manufacturer to reverse-match the geometry, issue a drawing for approval, and machine a dimensionally matched replacement. The practical question in this situation is not "which catalogue part fits" but "which supplier can reverse-match the geometry from the worn ring, issue a drawing...