Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.
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DTH Button Bit With Shanks DHD340, COP42, SD4, MISSION40. QL40, The Bit Diameter Range Is From 105mm To 152mm.
Different Faces Shapes:
Different Buttons Shapes:
1. Dome / Round button
Used as gauge buttons of DTH bits, suitable for very abrasive and very hard rock formation.
2. Parabolic / Semi-ballistic
Used as gauge buttons and front buttons of DTH Bits, suitable for medium abrasive and hard rock formations.
3. Ballistic button
Used front buttons of DTH bits, suitable for medium abrasive and medium hard formations. Also be used as gauge buttons for soft rock.
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