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China leading provider of dth hammer bits and dth drill bits, hunan new diamond construction machinery co., ltd. is dth drill bits factory.

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.

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Tipped drill bit service exporter from China, we're the most professional supplier from USA with ISO9001 Certification. Also the items have already been certified by mutiple safety certification.We'll offer our Tipped drill bit service priducts in top-quality and most favourable value.


Tipped drill bit service exporter from China, we are the most expert supplier from USA with ISO9001 Certification. Also the items have been certified by mutiple security certification.We'll offer you our Tipped drill bit service priducts in top-quality and most favourable price.

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