Mine Drilling Tools & Selection & use and normal maintenance

How To Choose Mining Drill Bits

1. Selection of drill bits for mines

According to the nature of the rock, choose a suitable  carbide mine drill bit. Generally speaking, for the rock with high hardness, the rock drill bit supplied by the alloy with relatively lower hardness is selected, and vice versa, the carbide drill bit with relatively higher hardness is selected. For extremely hard rocks, if the power of the rock drill bits is high, you can choose a three-blade or cross drill bit. At this time, in order to facilitate the unloading of the rock drill bit, the taper hole of the drill bit can be 11° or 12°. For the rock with medium hardness and good integrity, in order to improve the work efficiency and reduce the cost, a button bit can be used.

2. The choice of drill bit rod

The drill bits rod should ensure that there is only enough mating surface with the drill bit. Generally, the depth of the drill bits rod inserted into the drill bit should be ≥25mm, and the contact surface should be as large as possible, and the minimum should not be less than 60%. Therefore, try to choose drill rods that are machined with a taper tip. The drill rod used in conjunction with the drill bit should ensure that it is straight with naked eyes, and the impact end of the drill tail should be flat.

Whether it is a drill bit or a drill rod, it should be ensured that the water hole is unblocked.

How To Use Button Bit with Drill Bits Rods

When the button drill bit and the drill bit rod are in use, first check whether the drill tail is flat, whether the taper tip and the taper hole meet the requirements, whether the cutting edge of the drill bit is damaged, whether the water hole is unblocked, and whether the wind pressure and water pressure are sufficient And so on, it is strictly forbidden to collide between the alloys between the drill bits. When you start drilling, you should pay attention to the light wind, that is, the wind pressure should be lowered first, and the wind pressure can be gradually adjusted to normal after the drilling is stable. When withdrawing the drill, the drill should be turned back as much as possible, and try to avoid forcibly knocking and pulling, so as not to damage the drill bit or the drill rod and cause premature scrapping.