"I need the sharpest tools!" People often assume that when using PCD tools, the sharper the edge—and the thinner the cutting lip—the superior the cutting performance will be. In reality, however, this is not the case. When a grinding wheel is used to sharpen a tool's edge, there will occur numerous microscopic defects along the cutting lip. Consequently, the tool becomes easy to chipping even broken during operation. Therefore, a crucial step following the initial sharpening process is EDGE PASSIVASION. Among the various techniques employed for this passivation process, the use of Diamond Abrasive Wheel Brushes is the most common method.

Why Use Diamond Abrasive?

CNC cutting tools are typically manufactured from cemented carbide; their inherent hardness necessitates the use of abrasive materials—specifically diamond—that are significantly harder than common abrasives such as silicon carbide or aluminum oxide during the passivation process.
Furthermore, to enhance the surface finish of the cutting edge following passivation and to minimize chip evacuation resistance, abrasive filaments featuring relatively high-grit diamond particles—such as 600#, 800#, or 1000#—are typically employed.

Customization is Key

1. Filament Density: Different tool geometries require varying bristle densities to achieve an optimal balance between cutting forces and flexibility.
2. Filament Length & Trim: This factor influences the brush's stiffness. Excessive length can lead to uneven edge honing, while insufficient length results in a lack of resilience, preventing the brush from effectively conforming to complex tool geometries.
3. Abrasive Loading: The abrasive composition is customized based on the rotational speed of the client's automated equipment and their specific requirements for the honing duration.
4. Core Material (Base Design): Designed to interface seamlessly with specific CNC machines or honing equipment (such as the reinforced metal center-hole structure illustrated in the accompanying image).

Application Scenarios

• CNC Milling Cutters/Drills: Enhancing the impact resistance of cutting edges.
• Indexable Inserts: Ensuring coating adhesion (the importance of edge passivation prior to coating).
• PCD/PCBN Tools: Performing ultra-precise micro-finishing on materials of extreme hardness.

Contact Us for More

If you are looking for a good diamond wheel brush for your edge passivation work. Just contact us or leave us a note. Our team will be right by your side for your consultation.