The full name is down-the-hole drill rig, it is often called DTH borehole drilling rig, or blasting borehole drilling rig by most technicians. It is a small jackhammer installed on the end of a drill rod. The fast action of a jackhammer breaks hard rock into small pieces and dust and is cleared by the air exhaust system from the DTH hammer of the DTH blasting drilling rig.
With its newer technology, the DTH hammer is one of the fastest ways to drill hard rock. The smaller portable DTH drilling rigs with DTH hammers can drill as fast as a larger truck rig does.
Check the DTH Borehole Water Well Drilling Rig Price by sending us an inquiry on a specific model.
There is a system called percussion mechanism which is commonly called the hammer, it is behind the drill bit. The drill rod transmits the needed feed force and rotation to the drill bit and the compressed air for the hammer cleans the cuttings.
As the hole gets deeper, the drill rod will be added to the drill string successively behind the hammer. The piston system strikes the impact surface of the bit directly and the hammer casing guides the drill bit in a straight line, the impact force will not be lost in this process because the impact force does not have to pass through any joints at all.