2，6-8 degree diamond bit
The sales volume of this kind of bit is very large in the market. It is characterized by drilling extremely hard granite, siliceous rock and volcanic rock. When the footage efficiency of conventional bits is low or the footage does not slip, 6-8 degrees is the only choice for the captain.
3， 25-28 degree diamond bit (F50)
With the continuous innovation of bit production technology, the low footage efficiency of pdc bit in drilling broken rock strata, reinforced concrete and pebble layers has been solved. That is to choose diamond bit with matrix hardness of 25-28 degrees. It is a reinforced type of 20-25 degree drill bit, which is characterized by outstanding wear resistance and can fully match the pdc bit . Therefore, the manufacturer also calls it "Yan 50" drill bit, which means that its wear resistance has reached the standard of 50 degree, and the footage is completely incomparable with the composite bit. Therefore, the degree of 25-28 degrees has a large application range in the future and will dominate the market.
