ATLAS COPCO , Serial Number: 33738 Drill Dimensions: 30.5" X 12" X 9" Weight: 152 lbs Stroke Length: 2.5625" Impact Rate: 1900 blows per minute Impact Power: 9.6 HP Rotation Speed: 0-180 revolutions per minute Maximum Torque: 665 lb force ft Optimum Working Air Pressure: 100 psi Maximum Air consumption: 328 cfm Air Flushing: 1.5 cfm Water Flushing: 10 gal/min Optimum Hole Diameter: 1 7/8" to 3" Efficient Hole Depth: 100‘ @ 1 7/8" to 15‘ @ 3" Drill Steel Size: R32 (1.25") - R38 T38 (105") Hose Sizes: Air 1.5" / Water 0.75" Shank Size: 1.5 X 1.5" in lugged chuck BBC series drills are usually mounted on BMS screw feed assemblies 4‘ steel change to 6‘ steel change or chain feed on 3 Wheel Carrier.