Jw winco – 22ke48 – safety clutch assembly w/friction bearing – 41mm dia x 22mm bore & keyway the “teflon” coated surfaces provide minimal friction between bearing surfaces even when lubrication is being neglected. An oil-hole is provided in the clutch mechanism to accept lubrication. In the completely assembled safety clutch handwheel, there is a lubrication fitting located in the hub of the handwheel to lubricate the safety clutch unit.