Rigid Shaft Coupling Bore Diameter 1 3/16 in Bore Diameter 2 3/16 in Bore Type Round Clearance Diameter 0.65 in Coupling Construction One-Piece Coupling Material Carbon Steel Coupling Outside Diameter 9/16 in Different Bore Sizes No Keyway Depth 1 Not Applicable Keyway Depth 2 Not Applicable Minimum Bore Diameter 3/16 in Keyway Width 1 Not Applicable Keyway Width 2 Not Applicable Maximum Bore Diameter 3/16 in Maximum Speed 4 000 RPM Maximum Torque 28 in-lb Overall Length 7/8 in