Rigid Shaft Coupling Bore Diameter 1 1 15/16 in Bore Diameter 2 1 15/16 in Bore Type Round Clearance Diameter 3.66 in Coupling Construction Two-Piece Coupling Material Carbon Steel Coupling Outside Diameter 3 3/8 in Different Bore Sizes No Keyway Depth 1 Not Applicable Keyway Depth 2 Not Applicable Minimum Bore Diameter 1 15/16 in Keyway Width 1 Not Applicable Keyway Width 2 Not Applicable Maximum Bore Diameter 1 15/16 in Maximum Speed 4 000 RPM Maximum Torque 20 250 in-lb