Deep hole drill, specially used for processing of deep hole drill. Usually in machining the ratio of the hole depth and the hole diameter is greater than six mm hole called a deep hole. When the deep hole drilling, heat dissipation and chip removal is very difficult, because the drill stem long and thin, leads to poor rigidity, easy bending and vibration. So cooling and chip removal problems, is typically with the help of use pressure cooling system to solve.

According to the chip removal way, deep hole drill can be divided into outside chip removal and internal chip removal. Outside chip removal has gun drill, deep hole flat drill and deep hole twist drill, etc.; According to the different processing system, internal chip removal can be divided into BTA deep hole drill and jet drill and DF deep hole drill.

Gun drill: just have one cutting part, used for processing the barrel at the earliest. When drilling, cutting fluid from drill stem into the among them, after the drill head hole injection into the cutting zone, and then with a chip from the drill v-shaped groove discharge.

BTA deep hole drill, cutting fluid from the drill stem and hole wall interval feed into, by cutting fluid pressure will chip out of the inner hole of drill stem discharge.

Jet drill: a multipoint internal chip removal deep hole drill, drill pipes with inside and outside two layer, most of the cutting fluid from inside and outside drill pipes clearance into the cutting zone, and then together with the chip into the inner tube; The other a small part of the cutting fluid is through the end of a tube of crescent-shaped hole into the inner tube, produce injection effect, form the low pressure area, help suction chip.

DF deep hole drill, the drill mix together BTA deep hole drill and jet drill advantages together, use single tube, chip removal by push and suction dual function, improve the ability of chip removal.