QJ211-MPA-FAG Four Point Contact Ball Bearing 55x100x21mm Open The 51-25 Simplex Taper Lock

The 51-25 Simplex Taper Lock Sprocket is a premium-quality 25-tooth roller chain sprocket designed for use with 51 Simplex (single-strand) roller chain

Outside length 1420mm

allowing fast installation and dependable shaft retention

Inside length 7917mm / 311

QJ211-MPA-FAG Four Point Contact Ball Bearing 55x100x21mm Open The 51-25 Simplex Taper LockFAG Four point contact bearings are similar in their structure to double row angular contact ball bearings, but are considerably narrower in an axial direction due to only one raceway groove. Since the centres of curvature of the arc shaped raceways on the inner ring and outer ring are offset relative to each other, the balls are in contact with the bearing rings at four points under radial load. For this reason, four point contact bearings are only