Precision Ball Bearing

Precision Bearings for Accuracy-Critical Work

Spindles, tooling, and measuring equipment

Tighter tolerance classes buy repeatable runout, and on a grinder or measuring spindle that is the entire point of the part. Listings here include NSK 6013 P4 open bearings at 65x100x18 mm, ABEC 5 deep groove parts with machined brass cages and C2 tight internal clearance, and Fafnir MM9100-series units at 55x90x18 mm. Precision designations carry suffixes that matter as much as the base number, covering tolerance class, clearance, and preload, so quote the complete marking when asking about a substitute. Handle and store these carefully, since a dropped precision bearing is scrap. High-speed spindle pairs are more often angular contact bearings.

Ask about a precision equivalent