Cast iron housing fitted with a standard re-greaseable bearing insert, which has a set screw lock. This locking arrangement consists of two knurled cup-point, self- locking, socket-head set screws fitted in the extended inner ring. Self-lube bearings are factory charged with the correct amount of grease and do not require a further grease charge when being fitted. Re-lubrication is not normally necessary except when operating at extreme temperature, speed, loading, extended running or where excessive wet or dirty conditions exist. The housing is provided with a tapped hole to facilitate relubrication and supplied with a plastic plug and grease nipple, tapped ¼” UNF.