as a active manufacturer, we develop new designs every monthly, more importantly, ... air,no explosion,more safe.Pneumatic Manual Drilling Machine With a Suppoter Main SpecificationsTypeZQSJ-100/2.5Working PressureMpa0.5Rated Torque(N ... )170Air Consumption with loadm3/min4No-load speedr/min580Acoustic leveldB(A)100Sound Power leveldB(A)120Drilltail Size(mm) Weightkg25 Pneumatic Manual Drilling Machine