Korloy MGGN400-02-M CN20 4mm Double-Ended Cermet Grooving Insert for Finishing (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
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.
Korloy MGGN400-02-M price, 4mm cermet grooving insert for steel, mirror finish CNC grooving tool, CN20 cermet vs carbide for finishing, double ended 4mm profiling insert
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.