Rigid Shaft Coupling Bore Diameter 1 1 3/4 in Bore Diameter 2 1 3/4 in Bore Type Round Clearance Diameter 2.75 in Coupling Construction One-Piece Coupling Material Stainless Steel Coupling Outside Diameter 2 3/4 in Different Bore Sizes No Keyway Depth 1 Not Applicable Keyway Depth 2 Not Applicable Minimum Bore Diameter 1 3/4 in Keyway Width 1 Not Applicable Keyway Width 2 Not Applicable Maximum Bore Diameter 1 3/4 in Maximum Speed 3 500 RPM Maximum Torque 1 050 in-lb