... drill equipment , which can be widely used for surface drilling such as quarry, railway construction , road construction, small ... drill hammer for blast holes drilling , bench hole drilling , grout hole drilling , anchor hole drilling and etc.Ihe specification of ... Rigidity rockF=6-20Diameter of hole 80-105mmOptium drilling depth25mWorking pressure5-12barAir consumption≥10m³/minRotation speed0-65rpm ...