Diamond engineering drill bits are divided into dry core bits and wet core bits according to on-site working conditions:
Dry core bit: It is mainly used for drilling ordinary cement and brick, which is used on small horsepower drilling machine. No coolant is used, and the drilling depth is usually not more than 300mm. Because of the harsh conditions of the dry core bits, the bonding strength and reliability of the diamond segments and the base are required to be high. Therefore, a dry core bit mainly adopts laser-welded technology.
Wet core bit: It is mainly used for drilling reinforced concrete and hard cement. The drilling process requires water for cooling. Most diamond core drill bits are wet bits in the manufacture and application, and mainly are applied with laser welded and vacuum brazed technology.