Rigid Shaft Coupling Bore Diameter 1 2 in Bore Diameter 2 2 in Bore Type Round Keyed Clearance Diameter 3.37 in Coupling Construction One-Piece Coupling Material Carbon Steel Coupling Outside Diameter 3 3/8 in Different Bore Sizes No Keyway Depth 1 1/4 in Keyway Depth 2 1/4 in Minimum Bore Diameter 2 in Keyway Width 1 1/2 in Keyway Width 2 1/2 in Maximum Bore Diameter 2 in Maximum Speed 4 000 RPM Maximum Torque 20 250 in-lb Overall Length 4 7/8 in Shaft Locking Type Set Screw