Rigid Shaft Coupling Bore Diameter 1 3/4 in Bore Diameter 2 3/4 in Bore Type Round Keyed Clearance Diameter 1.84 in Coupling Construction Two-Piece Coupling Material Carbon Steel Coupling Outside Diameter 1 1/2 in Different Bore Sizes No Keyway Depth 1 3/32 in Keyway Depth 2 3/32 in Minimum Bore Diameter 3/4 in Keyway Width 1 3/16 in Keyway Width 2 3/16 in Maximum Bore Diameter 3/4 in Maximum Speed 4 000 RPM Maximum Torque 3 200 in-lb Overall Length 2 1/4 in