The Product Introduction ZQSJ-90/2.4A hand-held pneumatic drills applicable to the roadway, the semi-coal Lane probe the water probe gas drilling operations. Has a positive reversal function, and can facilitate the exit of the drill pipe drill is the ideal equipment for coal mines underground exploration water exploration gas drilling operations. The product also can replace the electric the outburst prevention rig, to help machine and exploring water exploration gas rig. Of ZQSJ-90/2.4A pneumatic handheld outburst prevention rigs technical parameters Model ZQS-90/2.4A applies pressure 0.4-0.63 MPa rated pressure 0.5 MPa rated forward torque Reverse torque 90N.m rated 90N.m Rated speed 240r / min rated output power of 2.4kW the dynamic stall torque 135N.m load air consumption ≤ 3.2m3/min load speed 550r/min noise ≤ 90dB (A) Machine weight 18kg Drilling size 13 × 13 (square) 18 x 18 ( side) 24 × 24 (side) efficient spiral drill pipe diameter φ76mm φ69mm φ42mm efficient drill diameter φ82mm φ76mm φ44mm