1、 Definition and Characteristics of PCD Countersink Drill

The PCD countersink drill is a super - hard tool with a high - strength alloy steel base and a cutting edge welded with polycrystalline diamond (PCD) composite inserts. It is specifically designed for high - precision machining in the aerospace field. Its core advantages are as follows:

Ultra - hard and Wear - resistant: The hardness of the PCD cutting edge reaches 8000 HV, and its wear resistance is 8 - 12 times that of cemented carbide. It can cope with the abrasive challenges of laminated materials such as carbon fiber (CFRP) and aluminum alloy.Precise Guidance: The tolerance between the guide post and the pre - drilled hole is ≤ 0.02mm, which suppresses machining vibration and deviation, and solves problems such as thin - wall deformation and composite material delamination caused by traditional tools.

Efficient Compound Machining: It is suitable for processes such as counter - sinking, chamfering, and countersinking, especially for key parts such as countersunk holes in carbon - fiber skins and rivet holes in aircraft wings.

2、Core Structure Analysis
Base Material and Process

Material Characteristics: Alloy steel with a hardness of HRC45 - 50 after heat treatment is used. It has both impact resistance and stability, making it suitable for the processing of laminated materials.

Structural Design: The front end can be customized with guide posts of different angles, which precisely cooperate with the pre - drilled holes to ensure coaxiality and reduce the delamination risk by more than 50%.

PCD Cutting Edge Technology

Material Composition: The PCD composite insert has a diamond content of ≥ 85%. The cutting edge is sharp and has a low friction coefficient, which suppresses carbon - fiber delamination and aluminum - alloy sticking to the tool.

Geometric Design: The cutting - edge angle can be customized according to requirements. It can achieve a contour accuracy of ≤ 5μm in combination with cold laser cutting (picosecond / femtosecond laser), or reach a mirror - level roughness (Ra ≤ 0.01μm) through diamond - wheel grinding, improving cutting stability.

Function of the Guide Post

Accurate Positioning: It guides the tool path through a fit with a tolerance of ≤ 0.02mm, ensuring the coaxiality of the countersink and the original hole, meeting the H8 - level accuracy requirements in the aerospace field.

Vibration Damping and Centering: It absorbs cutting vibration and reduces radial run - out. The service life of the guide post of the third - generation product is 80% higher than that of traditional cemented carbide, making it suitable for continuous batch processing.

3、 LINKUT Customization Solutions and Applications

Specification Customization: Standard 90°, 100°, and 120° countersink drills are provided, and non - standard angles in imperial / American systems (such as 110°, 130°), extended - type, stepped - type, and three - edge structures can be customized.

Scene Adaptation

Aerospace: Solves problems such as delamination and burrs in the processing of countersunk holes in carbon - fiber skins and ensures the accuracy of rivet holes.

Automotive Manufacturing: Used for the processing of precision holes such as engine bolt holes, improving tool life and surface finish.

Technical Advantages: The base is mirror - polished (Ra ≤ 0.2μm) to reduce friction, enabling efficient processing of laminated materials. After - sales service includes non - standard customization and technical support.

4、 Technical Summary

The PCD countersink drill breaks through the bottlenecks of accuracy and life in composite - material processing through the composite design of "alloy - steel base + super - hard PCD cutting edge + precise guide post". With its customization capabilities and aerospace - grade manufacturing standards, LINKUT provides a full - process solution from tool design to process optimization for high - precision countersinking, chamfering, and other processes, helping the aerospace and high - end manufacturing fields to reduce costs and increase efficiency.