How to Choose Suitable DHD350 DTH Button Bit
A?DTH button bit?is a type of drill bit for rock drilling,and it has tungsten carbide buttons on the face, which can crush and break the rock as the bit rotates. It work with a DTH hammer, which delivers percussive blows directly to the bit. This setup allows the bit to efficiently break up rock, ensuring faster and deeper drilling. They come in various sizes and configurations, allowing for different drilling depths and rock conditions. The choice of button shape, size, and arrangement can impact the performance and penetration rate. This article will take the DHD350 model as an example to introduce how to choose the right DTH drill bit.
How to choose right DHD350 DTH button bit
Specifications of DHD 350 DTH drill bits
DHD350-140mm,5 1/2inch, buttons: 7*18+7*14,flat face
DHD350-146mm,5 3/4inch, buttons: 7*18+7*14,flat face
DHD350-150mm,5 7/8inch, buttons: 8*18+8*14,flat face
DHD350-152mm,6 inch, buttons: 8*18+8*14,flat face
DHD350-140mm,5 1/2inch, buttons: 7*18+4*14+3*14,concave/convex face
DHD350-146mm,5 3/4inch, buttons: 7*18+4*14+3*14,concave/convex face
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DHD350-150mm,5 7/8inch, buttons: 8*18+4*14+4*14,concave/convex face
DHD350-152mm,6 inch, buttons: 8*18+4*14+4*14,concave/convex face
Note: Button Configuration of DHD350 drill bit including Spherical Buttons and Ballistic Buttons. Spherical buttons offer durability, ideal for drilling in hard and abrasive rock formations.
Ballistic buttons provide faster penetration in softer rock but tend to wear out faster in harder formations.
How to choose?
1. Convex type. The convex?face?type DTH drill bit can maintain a high rock drilling rate when drilling medium-hard and hard abrasive rocks.?But the straightness of the drill hole is poor. So?it is not suitable for drilling projects with high requirements for blasthole straightness.
2. Flat type: This type of drill bit 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 blasthole straightness.
3. Concave type: There is a conical concave part on the end face of the drill bit of this shape. And?it forms a slight nucleation effect during the rock drilling process to maintain the centering performance of the drill bit. The drilled blasthole has good straightness. This drill bit has good dust removal effect and fast drilling speed. It is the most commonly used DTH drill bit on the market.
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