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Centering bit 48-20-5495 (included) is recommended for exact spot drilling and to avoid bit wandering during use. the drift key 48-20-5497 (not included) allows for easy removal of the centering bit. the one piece core bits are available in sds-max or spline shanks, ranging from 1-1/2” to 6” diameters and overall lengths of 11-3/8” or 22”, with a drilling depth of 3”.

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 bit, drilling tool, drill bit manufacturer / supplier in china, offering hjg high performance 6 inch rock drill dth hammer, cemented carbide for mining, crawler hydraulic well-geothermal drilling rig hjg-w828a and so on.

China 6 inch dth hammers and dth bitschina . china 6 inch dth hammers and dth bits, find details about china dth hammer bits, drill rig from 6 inch dth hammers and dth bitsputian qideli drilling tools co., ltd. chat online; dth hammerminingdrillbit. 2019-09-23 dth drill bit for 6 inch mission60 dth hammer 165mm bit.

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