The internal combustion rock drill is a handheld rock drilling tool that is composed of a small gasoline engine, an air compressor, and a rock drill. A rock drill is a tool used to directly mine stone.
[pdf] Fill the oil reservoir with proper oil (Air Tool oil or 10W grade equivalent for 9 lb.and 15 lb.class and Rock Drill oil for the 38 lb.and 60 lb.class.) Check all nuts and bolts to ensure they are tight on the tool. Make sure retainer locks in place. Replace retainer and or springs if worn.
[pdf] Holes could be drilled to increasing depths without the loss of performance since the energy source was always directly behind the drill bit. The system was able to drill in almost all rock conditions that other systems were unable to do.OverviewA down-the-hole drill, usually called DTH by most professionals, is basically a .
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.
[pdf] 
