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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.

Dth drill hammer, dth hammer, dth drilling tools manufacturer / supplier in china, offering super quality 6 inch dth hammer for rock drilling, xrvs1050 / xrhs1150 portable mobile air compressor, xats1050 portable diesel air compressor for construction work and so on.

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