5inch DTH Drill Hammer - Buy DTH Drill hammer,
5inch DTH Drill Hammer. Choosing the right hammer is largely determined by hole size and type of rock formation. A 4 inch hammer will drill a 4 inch (102 mm) hole. The limiting factor is the outside diameter of the hammer, because, as hole diameter reduces, airflow is restricted. Maximum hole size for production drilling is the nominal hammer size ...
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