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Our company mainly researches, designs and manufactures the following products: high pressure dth hammers (which are the most advanced products in the field in china), all kinds of dth bits, eccentric drilling tools for drilling with casing in the cover rocks and loose rocks, all kinds of threaded bits, rc reverse circulation hammers and bits, shank adaptors and coupling sleeves, various kinds of tool joints and drill pipes, and spare parts for drilling …

Use one hand to hold the drill bit in place. tighten the jaws of the drills chuck by turning the metal chuck key with your other hand in a clockwise manner. tighten the chuck jaws as firmly as possible. remove the chuck key, and take your hand off the bit. test the drill to see if it is drilling properly.

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China api spec 5dp oil drill pipe 89mm g105 or s135, find details about china 3-1/2", api 5dp from api spec 5dp oil drill pipe 89mm g105 or s135…

China Down the hole bits mining manufacturer with years's experience, from China.We mainly supply China Down the hole bits mining with top quality and competitive price tag.we've got a professional China Down the hole bits mining product designers.Our solution is by way of the national specialist certification.


China Down the hole bits mining is definitely the product that we've continued to emerge inside the China market and achieved superior reputation. Our items advertising and marketing network at all over the China regions. Extra than ten years, we've created into a high-volume, multi-function in the traits, it may completely meet the demands in the China Down the hole bits mining industry.

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