We are a leading manufacturer of rock drilling tools, like DTH hammers and bits, DTH drill pipes, RC hammers and bits, top hammer button bits, coupling, cross bits, drill rods located in Xiamen, Fujian, China.
DTH and Top Hammer type Double casing drilling tools
Suitable for geothermal drill for grouting, sampling, water well drill, foundation drill etc.
Double head rotary percussive casing system utilizes a rotary head to drive the outer casing equipped with a tungsten carbide crown and a hydraulic drifter (top hammer) to drive the inner drill string equipped with a percussive drill bit. This is an excellent method for drilling straight holes in varying ground conditions. The water and compressed air can be both provided as power.
Outer Dia. (mm)
Reamed Dia (mm)
Inner Dia (mm)
Thread Size (mm)
Drill Rod Dia (mm)
Drill Bit Dia (mm)
Quality warranty Our products are made of high quality steel and all spares parts are inspected strictly before shipping.
Production time within 15-25 days after receiving the advance payment or full payment
Transportation according to your requests.
Package The material of packing is ply-wooden cases and pallet to avoid the damage in transportation.
Xiamen Bestlink Factory Co., Ltd is committed to provide the best drilling and cutting machine, tools and accessories products in marble and granite stone quarrying, as well as in civil engineering application, especial demolition project. it is now a leading manufacturer of cutting and drilling equipment for the extraction of marble, granite and ornamental stones in china.