Rigid Shaft Coupling Bore Diameter 1 7/8 in Bore Diameter 2 7/8 in Bore Type Round Keyed Clearance Diameter 1.74 in Coupling Construction Two-Piece Coupling Material Carbon Steel Coupling Outside Diameter 1 5/8 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 4 000 RPM Maximum Torque 2 280 in-lb Overall Length 2 1/2 in