Abstract: A bearing adjustment and monitoring system is provided for a bearing mounted between a hub and a spindle, one of which is rotatable relative to the other and one of which has a threaded end section with traversing keyway and the other of which has an abutment for limiting inward movement of the bearing. A backing washer member is arranged to removably abut the bearing on the end opposite the abutment and has a key extending into the keyway to secure it against rotation, and a calibrated nut member has threads configured for threading onto the threaded end section. One of the backing washer member and calibrated nut member has a plurality of circumferentially spaced openings and the other of the backing washer member and calibrated nut member has a plurality of openings registering with the openings in the one member but spaced apart differently therefrom, whereby to provide vernier adjustment of rotation of the calibrated nut member.

Abstract: A hub for greasing inner and outer shaft bearings on a spindle having greasing passageways leading in from the front of the hub. One passageway leads to the front of the outer bearing and the other passageway leads to the rear of the inner bearing. A purging passageway is provided between the inner and outer bearings whereby upon pressured grease being forced into greasing passageways in the direction of the purging passageways, new grease is forced in an axial direction through the bearings and old grease and contaminants are purged. An annular seal between the bearings provides the purging passageway with the spindle, such passageway being next to the shaft for maintaining a supply of grease on the shaft. The seal has at least one annular recess for providing additional storage of grease. Grease holding areas are provided adjacent the bearings such that grease is forced into the bearings by centrifugal force when the hub rotates on the spindle.