Rigid Shaft Coupling Bore Diameter 1 1 in Bore Diameter 2 3/4 in Bore Type Round Clearance Diameter 2.06 in Coupling Construction One-Piece Coupling Material Carbon 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 3/4 in Keyway Width 1 Not Applicable Keyway Width 2 Not Applicable Maximum Bore Diameter 1 in Maximum Speed 4 000 RPM Maximum Torque 1 850 in-lb Overall Length 3 in