Rigid Shaft Coupling Bore Diameter 1 2 in Bore Diameter 2 2 in Bore Type Round Clearance Diameter 3.56 in Coupling Construction One-Piece Coupling Material Carbon Steel Coupling Outside Diameter 3 1/8 in Different Bore Sizes No Keyway Depth 1 Not Applicable Keyway Depth 2 Not Applicable Minimum Bore Diameter 2 in Keyway Width 1 Not Applicable Keyway Width 2 Not Applicable Maximum Bore Diameter 2 in Maximum Speed 4 000 RPM Maximum Torque 13 680 in-lb Overall Length 4 7/8 in