Tire Buffer Product Type Tire Buffer Polishing Motion Rotary Included Pad Sizes Not Applicable Minimum Disc Diameter Not Applicable Maximum Disc Diameter 1 3/4 in Abrasive Mount Type Quick Change Slip Chuck Orbit Size Not Applicable Horsepower 0.47 hp Duty Light Grip Type Inline Speed Settings Variable Maximum Motor Speed 3 000 RPM Air Consumption 2 cfm Required Pressure 90 psi Air Inlet Size 1/4 in Air Inlet Type NPT Minimum Hose Size 3/8 in Spindle Thread Size 7/16 In.