They also help absorb thrust friction (Note: roller bearing must be used with hardened spanner bushing or hardened shaft).
. It has a split outer race shell into which the roller assembly is inserted. Listing is for one (1) Service Caster Series #20 swivel caster with a 5" diameter by 1-1/2" wide semi steel cast iron wheel and a top locking brake capable of supporting 300 lbs. The zinc plated finish provides durability under any condition, while the semi-steel wheels are abrasion resistant and rugged, maintaining effortless rolling under heavier loads, and provides a cost-effective solution over steel wheels.