Bearing assembly with integral sensor for sensing rotation

摘要

A bearing assembly tachometer device for attachment to a rotating shaft which comprises bearing target members disposed between a rotating inner ring member and a non-rotating outer ring to reduce friction therebetween, and a sensing device such as a Hall Effect sensor for detecting passage of the bearing target members as the inner ring member rotates, where the bearing target members are fixed in equidistant circumferential position about the inner ring member such that each said bearing target member rotates about the central axis of the inner ring member the same number of rotations as the inner ring member itself.