Amana Tool uses only the finest industrial quality precision ball bearings available. Bearings are double steel-shielded for extra rigidity and to inhibit dust. A special high-performance, high-temperature grease is used for maximum life., #47762, diameter (D) 1.319 (1-5/16), application 55320, 55330, 55325., b .335 (21/64), D 5/16, 47763 steel ball bearing guide 1-1/4 Overall DIA x 5/16 inner DIA x .196 Height