Flange Coupling Kit For Worm Center Distance 1.33 in Motor Frame Designation 56C Motor Coupling Bore Diameter 5/8 in Motor Coupling Keyway Depth 3/32 in Motor Coupling Keyway Width 3/16 in Reducer Coupling Bore Diameter 1/2 in Reducer Coupling Keyway Depth 1/16 in Reducer Coupling Keyway Width 3/16 in Flex Coupling Material Cast Iron For Use With 56C NEMA Frame Motor Dayton Indirect Drive Right Angle Speed Reducer Worm Center Distance 1.33 Includes Mounting Hardware