Korloy MGGN400-02-M CN20 4mm Double-Ended Cermet Grooving Insert for Finishing (10pcs)
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The Original Korloy MGGN400-02-M CN20 is a high-performance Double-Ended Multi-Functional Insert designed for High-Precision Grooving, Profiling, and Finishing. Utilizing the advanced CN20 Cermet grade, this 4.0mm width insert is specifically engineered to provide a mirror-like surface finish in Steel (P) and Cast Iron (K) machining. Its double-ended design offers superior cost-efficiency, while the specialized -M chipbreaker provides stable chip control during both radial plunging and axial turning operations.
The Cermet Advantage: CN20 (Cermet) offers higher chemical stability than traditional carbide. When machining steel, it minimizes tool-to-workpiece friction and heat, ensuring that your 4mm grooves remain dimensionally perfect with a superior aesthetic finish.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGGN400-02-M |
| Material Grade | CN20 (Uncoated Cermet) |
| Width (w) | 4.0 mm |
| Corner Radius | 0.2 mm |
Core Performance Benefits:
- Exceptional Surface Quality: The sharp edge and high anti-welding properties of cermet deliver a "polished" finish directly from the machine.
- Double-Ended Economy: Two cutting edges per insert reduce tool costs without compromising on precision.
- Precision Profiling: The -M chipbreaker is optimized for side-turning, making it ideal for creating complex 4mm wide profiles.
- Long Tool Life in Finishing: Exceptional wear resistance in continuous cutting conditions at high speeds.
Recommended Cutting Parameters:
| Material | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel | 140 - 280 m/min | 0.06 - 0.16 mm/rev |
| Alloy Steel | 110 - 230 m/min | 0.05 - 0.14 mm/rev |
| Cast Iron | 100 - 200 m/min | 0.10 - 0.20 mm/rev |
Compatible Tool Holders:
MGGN 400 series fits standard MGEHR/L 4.0mm external grooving holders:
- External Holders: MGEHR 2020-4 / MGEHR 2525-4 / MGEHR 3232-4
Expert Insight: When to use CN20 Cermet?
At 4.0mm width, the choice between Cermet and Carbide depends on your operation type:
Best for Finishing. Use this for the final pass at high RPM to achieve high brightness and tight tolerances. Avoid interrupted cuts.
Best for Roughing. Use carbide for removing bulk material, handling scale, or interrupted cuts where toughness is required.
Machinist's Pro Tip: For the best results with MGGN400 CN20, ensure your setup has zero vibration. Cermet is highly wear-resistant but brittle; stable high-speed spindle conditions will allow this insert to shine.
Packaging: 10 pieces per box.
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