Rigid Shaft Coupling Bore Diameter 1 40 mm Bore Diameter 2 40 mm Bore Type Round Clearance Diameter 77 mm Coupling Construction One-Piece Coupling Material Stainless Steel Coupling Outside Diameter 77 mm Different Bore Sizes No Keyway Depth 1 Not Applicable Keyway Depth 2 Not Applicable Minimum Bore Diameter 40 mm Keyway Width 1 Not Applicable Keyway Width 2 Not Applicable Maximum Bore Diameter 40 mm Maximum Speed 4 000 RPM Maximum Torque 400 N-m Overall Length 108 mm