Carbide drill bit is broken by rock pressure due to the impact load and its own rotation. In the drilling drilling, the drill bit subjected to high frequency impact load, and by the reverse, bending, stretching, compression and other complex stress role in the high-speed rotation of the environment subjected to rock, rock and mineral work Wear and corrosion of media.

Domestic and foreign use of the cone bit, mostly for the three cone bit. This bit is characterized by: axial pressure and impact load distribution range is large and uniform, and can make full use of effective space, drilling smooth. The size and shape of the carbide teeth for the cone bit must be applied to the characteristics of the rock, requiring good abrasion resistance, high strength, and less fragmentation and breakage. The carbide teeth used in the cone bits are: spherical teeth, conical teeth, wedge teeth, side wedges, and flat top teeth for rounds and claws.

In general, the drill bit drilled with extremely hard rock is mainly used spherical teeth, the pressure is 892 ~ 1339MPa, the speed is 50 ~ 80r / min; drilling hard and medium hard rock cone bit with cone teeth, drilling Pressure is 714 ~ 1071MPa, the speed of 60 ~ 100r / min; drilling soft and medium soft rock cone bit is the use of wedge teeth or wedge teeth, the pressure is 535 ~ 803MPa, speed 80 ~ 120r / min.