Rigid Shaft Coupling Bore Diameter 1 5/8 in Bore Diameter 2 5/8 in Bore Type Round Clearance Diameter 1.51 in Coupling Construction Two-Piece Coupling Material Carbon Steel Coupling Outside Diameter 1 5/16 in Different Bore Sizes No Keyway Depth 1 Not Applicable Keyway Depth 2 Not Applicable Minimum Bore Diameter 5/8 in Keyway Width 1 Not Applicable Keyway Width 2 Not Applicable Maximum Bore Diameter 5/8 in Maximum Speed 4 000 RPM Maximum Torque 1 600 in-lb Overall Length 2 in