Rigid Shaft Coupling, Bore Diameter 1 1/2 in, Bore Diameter 2 3/8 in, Bore Type Round Keyed, Clearance Diameter 1.33 in, Coupling Construction Two-Piece, Coupling Material Stainless Steel, Coupling Outside Diameter 1 1/8 in, Different Bore Sizes Yes, Keyway Depth 1 1/16 in, Keyway Depth 2 3/64 in, Minimum Bore Diameter 3/8 in, Keyway Width 1 1/8 in, Keyway Width 2 3/32 in, Maximum Bore Diameter 1/2 in, Maximum Speed 4,000 RPM, Maximum Torque 275 in-lb, Overall Length 1 3/4 in