Chinese 
English
Gun drilling is a kind of forced chip removing processing. High pressure cutting oil is inserted into the inner hole of gun drill to cool and lubricate gun drill edge. Steel chip and cutting oil are removed along the "V" shape groove, this is name "external chip removing".
The material for gun drilling is variety. Plastic such as glass fiber and Teflon, carbon steel, alloy, non-ferrous metal, high temperature heat resistance alloy, titanium alloy, etc. can be drilled. So gun drilling is widely used in manufacturing of auto parts, engine, oil pump and nozzle, mining machinery and hydraulic parts, etc.
Processing Accuracy
Hole Diameter: IT6~IT11
Inner Hole Roughness: Ra0.2~Ra6.3
Skewness: 1/1000 (single rotary of gun drill)
0.5/1000 (counter-rotary of workpiece and gun drill)
Processing efficiency
During drilling deep hole, it is no need for gun drilling tool to draw back to remove steel chips. According to the type of material and drilling hole diameter, drilling speed is from 30mm/min to 100 mm/min.
Surface Treatment of Gun Drill
Gun drill tip's material normally is carbide alloy which can satisfy most of materials' deep hole drilling. But for some special material, drilling with normal gun drill usually causes wasted products or high consumption of tools. So to coat the drill tip or use special material for manufacturing is necessary.
Coating technology can promote traditional gun drill's cutting character to 30% and to achieve higher fineness and dimensional accuracy in drilling special material.
GSM's coating: TiN (Yellow) , TiAlN(Dark Gray)
Application of Coated Gun Drill: High precise drilling Deep Hole of Soft Material
Drilling Deep Hole of Material of High Hardness
Set diamond blade in gun drill tip is mainly to resolve drilling problem of super hard material or material will cause heavy wearing of gun drill. Using diamond blade requires high stability of drilling. Because vibration can cause break.
If you have requirement, please feel free to contact us.
