How to Use the DTH Drill Bit Correctly?

At present, there are four main design forms of high air pressure DTH drill bits: end face convex type, end face plane, end face concave type, end face deep concave center type, carbide ball teeth are mostly used, spring teeth or ball teeth, spring teeth common distribution method.

How to use the DTH drill bit correctly and ensure the drilling speed and service life of the bit, ZZBETTER reminds you to pay attention to the following points:

1. Select the DTH drill bit according to the rock conditions (hardness, abrasiveness) and drilling rig type (high wind pressure, low wind pressure). Different forms of alloy teeth and cloth teeth are suitable for drilling in different rocks. Choosing the right down-the-hole drill bit is the premise of getting the best results.

2. When installing the DTH drill bit, gently put the drill bit into the drill sleeve of the DTH impactor, do not collide with a force so it will not damage the tail shank or drill sleeve of the drill bit.

3. In the process of rock drilling, it should be ensured that the compression pressure of the down-the-hole drilling rig is sufficient. If the impactor works intermittently or the blast hole powder is not discharged smoothly, the compressed air system of the down-the-hole drilling rig should be checked to ensure that the compressed air pressure of the drilling rig is sufficient. If the impactor works intermittently or the blast hole powder is not discharged smoothly, the compressed air system of the down-the-hole drilling rig should be checked to ensure that there is no rock slag in the hole during the drilling process.

4. If it is found that a metal object has fallen into the hole, it should be taken out with a magnet or other methods in time to avoid damage to the drill bit;

5. When replacing the drill, pay attention to the size of the drilled hole. If the diameter of the drill bit is too large and worn, but the blast hole is still drilled, the new drill bit cannot be replaced to avoid sticking.

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