About Down-the-hole drill arm modification
The DTH system completely revolutionised the blast hole industry with many quarries embracing it with open arms. Eventually the larger DTH systems then found their way into other applications, such as water well drilling and construction work.OverviewA down-the-hole drill, usually called DTH by most professionals, is basically ascrewed on the bottom of a . The fast hammer action breaks hard rock into small cuttings and dust that are evacuated.
DTH is short for “down-the-hole”. Since the DTH method was originally developed to drill large-diameter holes downwards in surface-drilling applications, its name originated from the fact that the percussion mechanis.
In DTH drilling, the percussion mechanism – commonly called the hammer – is located directly above the drill bit. The drill pipes transmit the necessary feed force and rotation to the hammer and the bit, along with the flui.
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