definition of gun drills?
Tungsten carbide gun drills are specialized cutting tools designed for efficient and precise drilling operations in various industries, including automotive, aerospace, and medical. They are known for their exceptional hardness, durability, and ability to withstand high temperatures and challenging drilling conditions.
Material and constructions
Tungsten carbide gun drills are made of tungsten carbide, a hard and wear-resistant material composed of tungsten and carbon. This material provides superior cutting performance and extended tool life compared to conventional steel drills.
Design and features
Gun drills feature a unique design with a long, slender body and a single cutting edge at the tip. The cutting edge is usually made of polycrystalline diamond (PCD) or cubic boron nitride (CBN), which further enhances cutting efficiency and durability. Gun drills also incorporate internal coolant channels that direct cutting fluid directly to the cutting zone, reducing heat buildup and improving chip evacuation.
Applications
Tungsten carbide gun drills are primarily used for deep hole drilling operations, where the depth of the hole is significantly greater than the drill's diameter. They are suitable for drilling various materials, including hardened steel, stainless steel, titanium alloys, and composite materials. Gun drills are commonly employed in the manufacturing of automotive components, aircraft parts, medical devices, and other precision engineering applications.
Advantages
- High cutting efficiency and speed
- Extended tool life and durability
- Ability to drill deep holes with high accuracy
- Reduced vibration and chatter during drilling
- Suitable for drilling hard and challenging materials
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Q: Are you a manufacturer?
A: Yes, Zhuzhou Kunrui Carbide Co., Ltd. was established in October 2011. It is a private high-tech enterprise integrating the research, development, production, and sales of cemented carbide round rods, carbide finely ground rods, tubes, strips, gun drills, and other alloy products.
Q: Do you supply raw materials or finished products too?
A: Yes, we supply both gun drill raw materials and finished products.
Q： How long is the delivery?
A: For sample orders, delivery is within 3 days, for bulk orders, delivery is within 3-4 weeks.
1. Carbide is a hard and brittle material. Carbide and alloy steel drill pipes have different thermal expansion coefficients, which will produce stress. Before welding, the parallel straightness of the drill pipe and the alloy head must be done, and processing is required. After cleaning the oxide layer on the surface of the cemented carbide and the drill pipe, clean the surface with medical alcohol (99.99%) normally and apply flux. It is best to use a 50% pure silver brazing sheet (or composite soldering sheet) To avoid cracking the welding surface of cemented carbide caused by stress concentration, it is not suitable to heat rapidly during welding. The optimal welding temperature during welding is 690±10℃. After welding is completed, the temperature will be about 400℃ after the solder has solidified. When disassembling the gun drill, place it in an insulating barrel (the conventional one in China is lime) or a thermostat, stabilize it for a certain period, and then cool it with the furnace to eliminate stress.
2. The gun drill should use coolant during the grinding process to prevent thermal stress caused by local overheating caused by dry grinding.
3. Before drilling, the gun drill must be supported by the guide sleeve or the guide hole before starting the spindle. When using it, always pay attention to whether the gun drill is normal and check whether the main blade is damaged. If there is damage, stop using it and use a special gun drill. Drilling and grinding fixtures and standard grinding drawing parameters are used for grinding, so as not to affect the processing efficiency and quality and cause unnecessary troubles. For blades with excessive chipping, the tool needs to be cooled during grinding to avoid breaking the welding surface. It is recommended to grind after wire cutting. The grinding wheel size for normal grinding gun drills is between 180-320#. If the grinding wheel is too thick, it will cause large chipping on the cutting edge, which will affect the efficiency and processing effect.
4. Select different gun drill product grades, cutting parameters, and feed rates for different processed material objects, to achieve the best effect of gun drill.
5 Carbide gun drilling tools should be stored in a dry environment away from a corrosive atmosphere.
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Contact us
Zhuzhou Kunrui Carbide Co., Ltd.
Add: B10 building, Nanzhou Industrial Area, Lukou District, Zhuzhou City, Hunan Province, China
Mob: +8615673354243
Tel: 0731-2727-6838
Fax: 0731-2727-6838
Email: info@zzkrhj.com
WhatsApp/WeChat/Telegram: +8615673354243
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