Comparetion with the other dth hammer bit
When you are going to drill a very large hole in a very hard rock formation, the single DTH hammer might be a good choice to fulfil the projects. However, the cost of large diameter DTH hammer are very high and it requires many air compressors. In this case, the cluster drills would be a better choice as the cluster drills is capable to drill large diameter holes with less bits and hammers and also less air compressors.
The cluster drill is several DTH (down-the-hole) hammers assembled together as one unit. It is the most cost effective solution to drill large diameter holes in rock which meets the needs of bridge piers, secant wall drilling, ventilation drill, caissons & other foundation engineering.
Adoped with the rotary drill rigs in different brand
cluster hammer Drill from Kimdrill, is designed to fulfill piling purpose on rotary drill rigs, especially under hard rock condition. It adopts the kelly box like Bauer, Soilmec, Mait, Casagrande, Sany, XCMG, Zoomlion and so on.