Rigid Shaft Coupling, Bore Diameter 1 1 in, Bore Diameter 2 1/2 in, Bore Type Round, Clearance Diameter 2.05 in, Coupling Construction Two-Piece, Coupling Material Stainless Steel, Coupling Outside Diameter 1 3/4 in, Different Bore Sizes Yes, Keyway Depth 1 Not Applicable, Keyway Depth 2 Not Applicable, Minimum Bore Diameter 1/2 in, Keyway Width 1 Not Applicable, Keyway Width 2 Not Applicable, Maximum Bore Diameter 1 in, Maximum Speed 4,000 RPM, Maximum Torque 1,200 in-lb, Overall Length 3 in