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Classification Of DTH Drills
Jun 28, 2018

1, the end surface convex face: This kind of drill is divided into two forms, single convex platform and double face, the latter is mainly used for large diameter DTH bit.

The face convex surface dth bit can keep a high rock drilling rate while drilling hard and hard abrasive rock, but the straightness of the borehole is poor, and it is not suitable for the rock drilling engineering with high jewel hole straightness requirement.

2, End plane type: This shape of the drill is more durable, suitable for drilling hard and extremely hard rock, but also for drilling gun jewel hole straightness requirements are not high in hard rock and soft rock.

3, End concave face: This shape of the solder head with a conical concave part of the end face, is the bit in the rock drilling process to form a mild nucleation action to maintain the performance of the drill, drilling hole has a good straightness, the drill has a good effect of powder, drilling speed, is currently used in the market more DTH drill. 4, the end of the deep concave center type: The shape of the drill is formed by the same type of ball-tooth brazing, the end of the bit center part of a deep concave center. For the nucleation in rock drilling, the straightness of hole can be ensured when drilling deep hole, only suitable for drilling soft rock and medium hard rock.


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