The high-torque permanent-magnet BL. Bench Motor provides plenty of power for grinding and polishing. Features variable speed control, permanently lubricated ball bearings, sealed motor housing, heavy-duty cast-iron base with four mounting holes and power indicator light. Includes two tapered spindles for buffs up to 4 in diameter, threaded right wheel mandrel for rubber grinding wheels up t 2 in diameter and right collet holder with 3/32 and 1/4 collets. Motor heights: 5-1/8 . Shaft height: 3-3/4 . Shaft diameter 5/16 . Dust collector hoods sold separately.