How to Achieve Mirror Finish in CNC Turning with CBN & PCD Inserts
In modern high-precision manufacturing, achieving a mirror-like surface finish (Ra < 0.4 μn) usually requires costly grinding or polishing. However, by using Zhuzhou chuangde’s CBN and PCD inserts, you can achieve superior surface quality directly on your CNC lathe, significantly reducing production costs.
1. Choosing the Right Tool Material
The key to a perfect finish is matching the tool material to your workpiece:
CBN (Cubic Boron Nitride): Ideal for hardened steel (HRC 45-80) and cast iron. It maintains sharp edges even at temperatures up to 1000°C.
PCD (Polycrystalline Diamond): The best choice for non-ferrous metals like aluminum and copper, providing a highly reflective, burr-free finish.
2. Core Technology for Mirror Finishing
Wiper Technology : Our specialized Wiper inserts "wipe" the surface smooth as they feed. At a feed rate of 0.15mm/rev, they can achieve a theoretical roughness of 0.6μm, which is 6x better than standard inserts.
Advanced PVD Coatings: Our Gold and Bronze coatings improve tool life by 20% to 50%, ensuring the mirror finish remains consistent throughout long production runs.
Key Application Industries & Products
Our superhard tools are widely used in sectors where surface integrity is critical:
Automotive & Transmission: Precision finishing of Gears, Gear Sleeves, and CV Joints. We help clients achieve "turning instead of grinding" on materials like 20CrMnTiH (HRC 58-62).
Precision Components: Machining Bearings, Shafts, and Engine Blocks to mirror-shine standards.
Powder Metallurgy: Providing stable tool life and high-speed efficiency for complex automotive pump parts.
4. Proven Performance (Case Studies)
Gear Machining: Achieved 350-400 pieces per edge, outperforming leading competitors by nearly 100%.
Transmission Shafts: Swapping to Micro-Drill CBN increased tool life by 67% while maintaining a stable Ra finish.
Ready to eliminate secondary polishing?Zhuzhou Micro-Drill offers a complete range of CBN and PCD solutions tailored for your precision needs.
Contact us today for a Technical Consultation or a Free Catalog Download
