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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”.

Down the hole hammers dth hammers for well and blast hole drilling. water well drilling hammer.

Dth hammer bit, dth hammer price, dth hammer button bits manufacturer / supplier in china, offering 6 inch dhd forging dth hammer for well drilling, t45-89mm button bit, t38 64mm-89mm flat drop centre retract thread button bit and so on.

73mm api oil drill pipe2 7/8" oil well drilling tubing casing pipe , find complete details about 73mm api oil drill pipe2 7/8" oil well drilling tubing casing pipe,drill pipe thread protector,api drill pipe,drill pipe manufacturers from steel pipes supplier or manufacturer-hebei yongming geological project machinery co., ltd.

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