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DTH Drill Bit

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Grand DTH Bits

Grand DTH bits are made of superior quality alloy steel which is made by Timken in U.S. Besides, all our DTH bits are using the brand "Element Six" T.C carbide which provides (the T.C buttons) for Boart Longyear

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DTH Bits, Down the hole bits, down the hole bit
Threaded Button Bits

With the top quality of alloy steels imported from USA and the best carbides made in China, we produce all threaded button bits by hot press technology.

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DTH Bits, Down the hole bits, down the hole bit
Grand Coupling Sleeves

Both semi-bridge and full-bridge coupling sleeves are manufactured by Tianjin Grand.

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Grand Coupling Sleeves
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DTH Drill BitPDC Bit
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Tianjin Grand Construction Machinery Technology Co., Ltd.
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