* Powerful.6 hp high performance motor for fast, efficient grinding in tight quarters * Aluminum alloy housing is rugged yet lightweight for maximum operator comfort * Spiral bevel gearing in angle head provides extended life and smooth low vibration * Excellent for weld preparation and smoothing, rust removal, deburring and blending of steel, cast iron and aluminum Model Specs Collet/Spindle Size 3/8-24 Wheel Size 4 Free Speed rpm 12,000 Length in.9 Avg. Air Consumption cfm 6 Actual Air Consumption @ load cfm 24 Air Inlet Thread Size NPTF in.1/4 Min. Hose Size in.3/8 Sound Pressure dB(A) 85 Vibration m/s² 4.8.