Custom D16mm Thru Coolant Carbide Drill Bit Bronze Coating For Metal Steel

Product Specification

Customized alloy drill with internal cooling - a reliable choice for efficient deep hole machining

This customized alloy internal cooling drill bit, has a bronze PVD coating, is specifically designed for efficient deep-hole machining

The cutting tool is made of high-quality ultra-fine grain cemented carbide, precisely ground and manufactured, featuring excellent wear resistance, high temperature resistance, and anti-adhesion performance. It can achieve stable cutting and precise hole diameter control when machining deep holes in kinds of materials such as steel, aluminum alloy, and stainless steel.

scope of application

Suitable for deep hole drilling of the following materials:
Steel components
aluminum alloy
stainless steel
Soft metals such as copper alloys
It is widely used for batch deep-hole high-precision machining in the following industries:
Automotive components (such as engines, valve bodies, etc.)
Mold cooling water circuit
Hydraulic valve body and pipeline system
Aviation parts processing
Medical device manufacturing

【Specifications】
Material: Ultra-fine grain carbide
Coating: Bronze PVD Coating
Cooling: Thru-coolant
Flutes: 2 or 3 flutes (customizable)
Flute Length: Customizable based on deep hole requirements
Applicable Machines: CNC machining centers, CNC drilling machines
Customizable Diameter Range: φ2mm - φ25mm

Five advantages of internally cooled drill bits

✅ 1. Efficiently cool the cutting area

The internal cooling channel precisely delivers cooling fluid to the cutting edge, quickly removing high temperatures to prevent tool overheating, chipping, or wear, ensuring stable cutting performance.

✅ 2. Smooth chip evacuation to prevent hole blockage

The most feared issue in deep hole machining is poor chip evacuation. The AMG internal cooling drill  avoids chip accumulation effectively  and tool jamming by flushing the chips with internal cooling fluid, keeping the hole clean and ensuring smoother machining.

✅ 3. Better machining accuracy and hole wall quality

Continuous cooling and rapid chip removal can reduce thermal deformation, prevent scratching of the hole wall, ensure stable hole diameter and high surface finish, making it suitable for high-precision applications.

✅ 4. make the tool have a long life

Reducing thermal shock and chip friction leads to slower tool wear and a reduced tool change frequency.

✅ 5. Preferred choice for deep holes, high-speed machining, and difficult-to-machine materials

For difficult-to-machine materials such as stainless steel and titanium alloys, as well as deep holes exceeding 30D and 50D, internal cooling drills can effectively solve the problems of heat dissipation and chip removal, ensuring long-term stable operation.

Why must an internal cooling structure be chosen for deep hole machining?
1. Heat is difficult to dissipate in deep holes, which can easily cause tool burn
The external coolant cannot effectively reach the cutting zone, leading to excessive temperature, which can cause tool deformation, workpiece expansion, and even burn damage to the hole wall.
2. Difficulty in chip removal and high risk of hole blockage
It is difficult to discharge chips from deep holes, which can easily lead to accumulation, chip jamming, and tool breakage. This not only affects efficiency but may also damage the workpiece.