Rigid Shaft Coupling Bore Diameter 1 1 3/8 in Bore Diameter 2 1 3/8 in Bore Type Round Keyed Clearance Diameter 2.38 in Coupling Construction One-Piece Coupling Material Carbon Steel Coupling Outside Diameter 2 3/8 in Different Bore Sizes No Keyway Depth 1 5/32 in Keyway Depth 2 5/32 in Minimum Bore Diameter Not Applicable Keyway Width 1 5/16 in Keyway Width 2 5/16 in Maximum Bore Diameter Not Applicable Maximum Speed 1 800 RPM Maximum Torque 1 500 in-lb Overall Length 4 1/2 in