Rigid Shaft Coupling, Bore Diameter 1 1/4 in, Bore Diameter 2 1/4 in, Bore Type Round, Clearance Diameter 0.5 in, Coupling Construction One-Piece, Coupling Material Stainless Steel, Coupling Outside Diameter 1/2 in, Different Bore Sizes No, Keyway Depth 1 Not Applicable, Keyway Depth 2 Not Applicable, Minimum Bore Diameter 1/4 in, Keyway Width 1 Not Applicable, Keyway Width 2 Not Applicable, Maximum Bore Diameter 1/4 in, Maximum Speed 3,500 RPM, Maximum Torque 38 in-lb, Overall Length 3/4 in