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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”.

Our high-performance percussive drilling tools include threaded and tapered drill bits, dth hammers and bits, extension and tunnelling rods, integral and tapered rods, shank adapters and other drill tool accessories. down-the-hole (dth)

115mm mission 40 well drilling dth hammer button drill bit down the hole (dth) hammer bits dth hammer bits roschen hammer bits or dth button bits range in size from 2" hole diameter upwards (50.1mm) to 36 (914...

The optimum range of hole size for dth drilling is 90 mm (3.5”) to 254 mm (10”). smaller holes are generally drilled using tophammer drill rigs, and larger holes generally use rotary drill rigs. 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”).

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1 2 drill bit trader manufacturer with years's encounter, from China.We mostly supply 1 2 drill bit trader with good quality and competitive price tag.we've an expert 1 2 drill bit trader item designers.Our product is by means of the national qualified certification.

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