Air Motor, Output Power @ Maximum Speed 4 hp, Maximum Torque 84 in-lb, No Load Speed 3,000 RPM, Maximum Flow Rate 128 cfm, Shaft Diameter 5/8 in, Shaft Length 2 in, Mount Type Flange, Inlet Size 1/2 in, Air Inlet Type NPT, Rotation CW/CCW, Housing Material Aluminum, Cast Iron, Shaft Material Grade 40Cr, Bearing Protection Not Applicable, Maximum Operating Pressure 100 psi, Includes Muffler, Keyway Width 1/8 in, Weight 15.44 lb, Housing Material Grade Not Applicable WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov -