Range of use: 1, coal mining, digging pedestal pit, open ditch; 2, mining in soft rock; 3, construction and installation, frozen soil and ice crushing of concrete; Need to impact movement 4, machinery industry in the occasions, such as tractor, loading and unloading tank track pins. Technical specifications Length 510mm Air pipe inner diameter 19mm Rammer stroke 165mm Rammer diameter 48mm Air pressure 0.63Mpa Impact Energy ≥ 60 J Impact frequency 15HZ Air consumption 23L/S