Korloy MGMN400-M CN2000 4mm Double-Ended Cermet Insert for High-Gloss Finishing (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MGMN400-M CN2000 is a heavy-duty 4.0mm Double-Ended Cermet Insert designed for Ultra-High Precision Finishing of Steel and Cast Iron components. As a titanium-based ceramic composite, the CN2000 grade offers exceptional chemical stability, which prevents material welding even at high peripheral speeds. The 4.0mm width provides maximum lateral rigidity, making it the perfect choice for finishing grooves on large-diameter shafts where surface integrity and dimensional hold are critical.
The Cermet Advantage: CN2000 produces a superior "glossy" finish that coated carbide simply cannot match. It effectively eliminates the "cloudy" surface finish often seen in steel machining, providing a mirror-like result directly from the lathe.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN400-M |
| Insert Width (w) | 4.0 mm |
| Grade | CN2000 (Advanced Cermet) |
| Chipbreaker | -M (Precision Finishing Geometry) |
Core Performance Benefits:
- Mirror-Like Finishing: Achieve exceptional surface roughness (Ra) on steel parts, often eliminating secondary grinding processes.
- High-Speed Efficiency: Cermet’s high heat resistance allows for 50-100% higher cutting speeds compared to standard carbide.
- Enhanced Rigidity: The 4.0mm body ensures the tool remains stable during deep radial finishing, preventing chatter marks.
- Exceptional Edge Retention: Maintains sharp cutting edges longer during continuous finishing passes, ensuring batch-to-batch consistency.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Low/Medium Carbon Steel | 180 - 350 m/min | 0.08 - 0.18 mm/rev |
| Alloy Steel (e.g., 4140) | 150 - 280 m/min | 0.06 - 0.15 mm/rev |
| Nodular Cast Iron | 160 - 380 m/min | 0.10 - 0.22 mm/rev |
Compatible Tool Holders:
Pairs with heavy-duty 4.0mm MGEHR/L external holders:
- External Holders: MGEHR 2020-4 / 2525-4 / 3232-4
The High-Speed Choice: Cermet (CN2000) vs. Carbide (NC3120)
When choosing for 4.0mm grooves, consider your machine speed and desired finish:
The Precision Finisher. Use for high-speed, continuous finishing cuts. It provides a mirror finish and maintains size but is susceptible to shock. Speed is its friend.
The Tough Worker. Better for roughing, interrupted cuts, or heavy removal. It handles vibration better but cannot reach the high-gloss levels of Cermet.
Machinist's Pro Tip: For the MGMN400-M CN2000, high surface speed is the key to success. If the finish looks dull, increase the RPM. However, always ensure your setup is rigid; Cermet is more brittle than carbide and does not like vibration or "bouncing" in the cut.
Packaging: 10 pieces per box.
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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.