gearboxes or gear units, ball screws, cam followers, alternating current (ac) electric motors, direct current (dc) electric motors, o rings, paints, power transmission components, roller bearings, sealants, shaft collars, motion bearings, alternating current (ac) drives, direct current (dc) drives available from eastern bearings, inc. based in waltham, ma. click the links below to visit our website or contact us via our profile page.