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A small trick to choose a submersible head.
Release time:
2019-10-21
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now on the marketDTH BITThere are many kinds of products, and manufacturers have their own arguments on the quality of drill bits. It is easy to say that those who know the business are not easy to find high-quality and low-cost drill products for dealers who do not know the business. Then the question comes, how should we choose the DTH drill? Come, Yi Kuang Xiaobian quietly tell you a few small tricks to choose the DTH drill, this is the exclusive secret!
DTH bits are mainly divided into two series of DTH bits with high wind pressure and low wind pressure. The use of high-quality raw materials, through advanced production technology. Widely used in earthwork, mining, water well drilling, construction projects.
There are four main types of end face design currently used in the down-the-hole drill bit category: the end face convex type, the end face plane type, the end face concave type and the end face deep concave center type. Cemented carbide multi-choice ball teeth, spring teeth or ball teeth and spring teeth shared tooth distribution mode.
1. Convex type: This drill is divided into two forms, single boss and double boss end face, the latter is mainly used for larger diameterDTH bit. The end-face convex-type down-the-hole drill can maintain a high drilling rate when drilling hard and hard abrasive rocks, but the drilling straightness is poor, and it is not suitable for rock drilling projects with high requirements for hole straightness.
2. Face plane type: The drill bit of this shape is relatively strong and durable, suitable for drilling hard and extremely hard rocks, and also suitable for drilling medium hard rocks and soft rocks with low requirements for hole straightness.
3. Concave type of end face: There is a conical concave part on the end face of the drill bit with this shape, which forms a slight nucleation effect during rock drilling to maintain the centering performance of the drill bit. The drilled hole has good straightness. The drill bit has good powder discharge effect and fast drilling speed, and is currently used in the market.
4. Deep concave center type of end face: This shape of drill bit is evolved from the same type of ball tooth drill bit, and the center of the end face of the drill bit has a deep concave center part. It is used for nucleation in the process of rock drilling, and ensures the straightness of the blast hole when drilling deep holes. It is only suitable for drilling soft rock and medium hard rock.
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