Rigid Shaft Coupling Bore Diameter 1 7/8 in Bore Diameter 2 7/8 in Bore Type Round Keyed Clearance Diameter 1.75 in Coupling Construction One-Piece Coupling Material Carbon Steel Coupling Outside Diameter 1 3/4 in Different Bore Sizes No Keyway Depth 1 3/32 in Keyway Depth 2 3/32 in Minimum Bore Diameter Not Applicable Keyway Width 1 3/16 in Keyway Width 2 3/16 in Maximum Bore Diameter Not Applicable Maximum Speed 1 800 RPM Maximum Torque 660 in-lb Overall Length 2 in