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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.

Our business primarily engaged and export custom rock drill bits in Egypt. we depend on powerful technical force and frequently develop sophisticated technology to meet the demand of custom rock drill bits in Egypt shoppers. We're sincerely welcome good friends from different circles at home and abroad come to cooperate!


We're suppliers of all kind of custom rock drill bits in Egypt moved in market place for terrific sales, we've custom rock drill bits in Egypt variety and specification's which will suit our customer's satisfaction. We have also attached custom rock drill bits in Egypt samples and other of our needs together with the above attached catalog sample.

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