Rigid Shaft Coupling Bore Diameter 1 3/8 in Bore Diameter 2 3/8 in Bore Type Round Clearance Diameter 0.93 in Coupling Construction Two-Piece Coupling Material Carbon Steel Coupling Outside Diameter 7/8 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 190 in-lb