1/2 hp variable speed dc drive kit motor control pulleys belt 395-10260 rpm new control box measures 6 wide x 4-3/4 tall x 3 deep + projections for switches and cord grips. The motor shaft is 591 (15mm) diameter x 1-3/8 (35mm) long. Motor body is 3-1/8 (79mm) diameter x 7-1/2 (191mm) long.