offers 7,580 8 bit rock products. About 68% of these are mining machinery parts. A wide variety of 8 bit rock options are available to you, such as …
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Get PriceEuropean company Diager has been making drill bits for more than half a century and now manufactures over 35 million bits a year. Their toprated drill bits for stone and hard stone are the Boostermax and Boosterspline. They are made of chrome vanadium steel with copperbrazed tips.
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Get PriceA total of three rollercone bits, equipped with a single seal configuration, were used in the 8½in. hole section to drill a hard and abrasive granite with average temperatures of 320°F–350°F, with spikes up to 570°F. The three bits demonstrated superior performance compared to standard rollercone products and came out of the
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