Part Number: 8400-129
The main thrust bearing supports the axial load of the spindle and headstock assembly. It is critical for maintaining spindle accuracy and preventing axial play, which directly affects part quality in boring and turning operations. Worn thrust bearings cause rumble, vibration, and dimensional inaccuracy.
7 orders on file
May be ordered alongside other headstock bearings: 8400-236 (1⅞"), 8400-222 (LS14½ / LJ1⅞), 8400-223 (RLS14½ / LRJ1⅞).
Technical Note: Bearing replacement should be done by qualified millwrights. Requires precision pre-load setting per the W&B manual for the specific series.
Or call us: +1-847-427-9360