Major Brand LFR5201-142RS Yoke Type Track Roller with U Groove 12x39.9x18mm

Rubber Sealed U Groove Track Roller Bearings: These U groove profile double row ball bearings are manufactured with rubber seals inserted into the outer raceway to help prevent ingress of foreign matter into the bearing and serve to retain the pre-filled grease in the bearing. The U profile ground into the outer raceway is designed to allow the bearing to run along rails or other guides. The seal can be easily removed for applications that only require 1 seal.
Benefits: Acts as a guide roller, rubber sealed