The World's Leaders in Rock Drilling Equipment

Down the hole hammers, usually called DTH by most professionals, are basically a mini jackhammer screwed on the bottom of drill strings. The fast hammer action breaks hard rock into small flakes and dust and is blown clear by the air exhaust from the DTH hammer bits. DTH drills are one of the fastest ways to drill hard rock. It was only when down the hole hammers came along that many of the problems associated with the other systems were overcome – with the DTH system the energy source is constantly behind the drill bit, the drill tubes are rigid being only slightly less in diameter than the drill bit, copious amounts of air can be passed through the drill string to operate the horizontal drilling DTH Hammer which is then used to efficiently flush the bore hole clean. Horizontal directional drilling DTH drilling tools did not require heavy down thrusts or high rotational speeds and as such a light, cheap machine could be employed to carry out the drilling process – the machine could also be worked by one man, whereas some other systems required two operatives.