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 1 3/8 in, Mount Type Foot, 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 Not Applicable, Weight 16.98 lb