Notes on the Use of Down-the-Hole Drill Bits

Select down-the-hole hammers according to rock conditions (hardness, abrasiveness) and drilling rig type (high air pressure, low air pressure). Different forms of alloy teeth and tooth arrangements are suitable for drilling different rocks. Selecting the correct down-the-hole hammer is a prerequisite for achieving optimal results.

To ensure the correct use of down-the-hole drill bits, guaranteeing drilling speed and service life, please note the following:
 
1. Select down-the-hole drill bits according to rock conditions (hardness, abrasiveness) and drill rig type (high air pressure, low air pressure). Different forms of alloy teeth and tooth arrangements are suitable for drilling different rocks. Selecting the correct down-the-hole drill bit is a prerequisite for optimal use;
 
2. When installing the down-the-hole drill bit, gently insert the drill bit into the chuck of the down-the-hole hammer, avoiding forceful collisions to prevent damage to the drill bit shank or chuck;
 
3. During drilling, ensure sufficient compressed air pressure for the down-the-hole drill rig. If the impactor works intermittently, or the cuttings are not discharged smoothly, check the down-the-hole drill rig's compressed air system to ensure that there is no rock debris in the hole during drilling;
 
4. If metal objects fall into the hole, remove them promptly using a magnet or other methods to avoid damaging the drill bit;
 
5. When changing drill bits, pay attention to the size of the already drilled holes. If the drill bit diameter is excessively worn, but the hole has not yet been drilled, do not replace it with a new drill bit to avoid getting stuck. Used drill bits with approximately the same worn diameter can be used to complete the work;
 
6. For down-the-hole drill bits that fail prematurely, please notify our company immediately. The notification should include:
 
1) Rock type and construction location;
 
2) Model of the matching impactor;
 
3) Drill bit failure mode (broken teeth, missing teeth, head chipping, shank breakage, etc.);
 
4) Drill bit service life (meters drilled);
 
5) Number of failed drill bits;
 
6) Meterage drilled under normal use