Ways to improve the service life of dth hammer:for the problem that affects the service life of the drill bit, the following solutions can be adopted: a. because the titanium alloy has large elastic deformation and the hole is easy to shrink, the drill tip is slightly sharpened to appropriately...
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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.
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