Instructions for using DTH drill bits

In order to use the DTH drill bit correctly and ensure the rock drilling speed and service life of the drill bit, the following points must be paid attention to:

1. Select the DTH drill bit according to the rock condition (hardness, abrasion) and the type of drilling rig (high wind pressure, low wind pressure).Different forms of alloy teeth and cloth teeth are suitable for drilling different rocks.Choosing the right DTH drill bit is a prerequisite for obtaining the best results;

2. When installing a DTH drill bit, gently place the drill bit into the drill sleeve of the DTH impactor, and do not collide with force to avoid damaging the tailstock or drill sleeve of the drill bit.;

3. During the rock drilling process, it is necessary to ensure that the pressure of the down-the-hole drilling rig is sufficient.If the impactor is working intermittently, or the powder discharge from the gun hole is not smooth, the compressed air system of the DTH drilling rig should be checked to ensure that there is no rock slag in the hole during the drilling process.;

4. If a metal object is found to fall into the hole, it should be sucked out with a magnet or removed by other methods in time to avoid damage to the drill bit.;

5. When replacing the drill bit, pay attention to the size of the gun hole that has been drilled.If the diameter of the drill bit is worn out excessively, but the gun hole has not been drilled well, do not replace the new drill bit to avoid getting stuck.You can use an old drill bit that has been used and wears roughly the same diameter to complete the job;

6. For down-the-hole drill bits that are abnormally scrapped in the early stage, our company should be notified in a timely manner. The contents of the notice mainly include：

1), Rock type and construction site;

2), supporting the type of impactor used;

3), The form of failure of the drill bit (broken teeth, lost teeth, broken bits of the drill bit head, broken bits of the drill bit tail shank, etc.);

4), The service life of the drill bit (the number of feet and meters that have been drilled);

5), The number of failed drill bits;

6), the number of feet and meters of the drill bit in normal use