Rigid Shaft Coupling, Bore Diameter 1 1/2 in, Bore Diameter 2 1/2 in, Bore Type Round Keyed, Clearance Diameter 1.25 in, Coupling Construction Two-Piece, Coupling Material Carbon Steel, Coupling Outside Diameter 1 1/4 in, Different Bore Sizes No, Keyway Depth 1 1/16 in, Keyway Depth 2 1/16 in, Minimum Bore Diameter 1/2 in, Keyway Width 1 1/8 in, Keyway Width 2 1/8 in, Maximum Bore Diameter 1/2 in, Maximum Speed 4,000 RPM, Maximum Torque 450 in-lb, Overall Length 1 7/8 in