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Dth drill rod is made of high quality material detected by spectrograph, impact and tension test. with fully digitized processing line introduced from japan with integral heat treatment equipment anti adhesion thread with nitrogen treatment on surface make it easier for handling.

As a rule of thumb, the smallest hole diameter a dth hammer can drill is its nominal size. i.e. standard 102 mm (4”) hammer will drill a hole down to a minimum diameter of 102 mm (4”). the limiting factor is the outside diameter of the hammer, because as the hole diameter reduces due to diameter wear of the bit, airflow is restricted.

Codes for dth bits example: 100-5165-59-1211,08-20 =165 mm dhd 360 head design examples: 0 = dth bit l = long head r = long retrieval head bit type examples: 5 = button bit bit diameter in mm 165 = 165 mm head features examples: 0= gradedth bit b= back reamingproduct inserts g= gauge protection insert t= fish thread type of 1= drill bit 2 ...

Designed for drilling in extremely hard materials including stainless steel cobalt drill bits have a great resistance to heat and friction providing a longer tool life cobalt drill bits offer 12 times life rating when compared to standard 118-degree point drill bits

We attach importance to innovation, specifically with patents of China on length of drill pipe prices, its excellent technologies has reached the international advanced level, and includes a high reputation inside the length of drill pipe prices market. Our group not only has fantastic researchers and market nationwide sales and service network, but also are China customers specified brand suppliers.

length of drill pipe prices exporter from China, we're one of the most skilled supplier from USA with ISO9001 Certification. Also the items happen to be certified by mutiple safety certification.We will provide our length of drill pipe prices priducts in top-quality and most favourable value.

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