Features Specifications:Sell B67C Jack hammer Over Length(mm) 615 Total weight (kg) 30 Cylinder Dia.(mm)50.8 Working pressure(Mpa) 0.63 Impact Energy (J)37±10% Impact Power(Kw)0.9±10% Blows frequency(Hz)24±5% Air Consumption(L/S)42±155 Shank size(mm) 32*152 Air Pipe Dia.(mm)19 The paving breaker model B67C is tools with compressed air as its power.The compressed air is distributed alternatively through the distributi9ng vaive into either end of the cylinder assembily so that the hammer inside is made to carry on a reciprocal motion which impacts the shank of the steel chisel by the tappet drives the chisel into the concrate foundation and makes them split into huge pieces.