China Pnuematic Rock Drill manufacturers Description: Model PB40-90 Pneumatic Hammer Breaker is featuring proper weight,durability great efficiency and speed. It also can complete reinforced concrete, Rock and Asphalt etc. can endure the extremely hard condition Quick reblading-type gripper, easy changing chisel, Hex. Shank. It is used to break or excavate the asphalt. ModelPB40PB60PB90 Piston diameter44mm57.15mm66.67mm Piston stroke100mm146mm152mm Impact frequency900 minute/Time1250 minute/Time1400 minute/Time Net weight18kg/39.6lbs30kg/60lbs42kg/92.4lbs Total length660mm645mm723mm Air consumption1.6m3/minute2.0m3/minute2.2m3/minute Hose size19mm(3/4inch)19mm(3/4inch)19mm(3/4inch) Shank specifications1脳4-1/4 25X1081脳4-1/4 25X1081脳4-1/4 25X108 Inlet size3/4pt3/4pt3/4pt Air pressure0.63Mpa0.63Mpa0.63Mpa All parts of machine are made of alloy steel, and have great durability. Back head is fixed by four bolts, and can endure the extremely hard condition Quick reblading-type gripper, easy changing chisel, Hex. According to feedback from most customers, Shank Pneumatic Hammer Breaker is a powerful broken tool. if you are interested in this product, please contact me to know more: Email:susan@langvic.com Mobile phone/Whatsapp:0086-18802956872China Pnuematic Rock Drill manufacturers website:http://www.langvicmachinery.com/pnuematic-rock-drill/