Rigid Shaft Coupling Bore Diameter 1 5/8 in Bore Diameter 2 1/2 in Bore Type Round Clearance Diameter 1.56 in Coupling Construction Two-Piece Coupling Material Stainless Steel Coupling Outside Diameter 1 5/16 in Different Bore Sizes Yes Keyway Depth 1 Not Applicable Keyway Depth 2 Not Applicable Minimum Bore Diameter 1/2 in Keyway Width 1 Not Applicable Keyway Width 2 Not Applicable Maximum Bore Diameter 5/8 in Maximum Speed 4 000 RPM Maximum Torque 380 in-lb Overall Length 2 in