Rigid Shaft Coupling Bore Diameter 1 20 mm Bore Diameter 2 20 mm Bore Type Round Keyed Clearance Diameter 42 mm Coupling Construction One-Piece Coupling Material Stainless Steel Coupling Outside Diameter 42 mm Different Bore Sizes No Keyway Depth 1 2.9 mm Keyway Depth 2 2.9 mm Minimum Bore Diameter 20 mm Keyway Width 1 6 mm Keyway Width 2 6 mm Maximum Bore Diameter 20 mm Maximum Speed 4 000 RPM Maximum Torque 110 N-m Overall Length 65 mm Shaft Locking Type Set Screw