Rigid Shaft Coupling Bore Diameter 1 7/8 in Bore Diameter 2 7/8 in Bore Type Round Clearance Diameter 1.42 in Coupling Construction Two-Piece Coupling Material Carbon Steel Coupling Outside Diameter 1 5/8 in Different Bore Sizes No Keyway Depth 1 Not Applicable Keyway Depth 2 Not Applicable Minimum Bore Diameter Not Applicable Keyway Width 1 Not Applicable Keyway Width 2 Not Applicable Maximum Bore Diameter Not Applicable Maximum Speed 4 000 RPM Maximum Torque 2 280 in-lb