Korloy MGMN400-M NC3220 4mm Double-Ended Pro-Steel Grooving Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MGMN400-M NC3220 is the definitive 4.0mm Double-Ended Grooving Insert for the modern era of Universal Steel Machining. Utilizing Korloy's most advanced NC3220 CVD coating, this insert is engineered to handle the higher heat and mechanical stresses of 4.0mm wide cutting operations. It is the perfect upgrade for workshops looking to maximize productivity on carbon steels and alloy steels without sacrificing tool life or surface finish.
Superior Performance Upgrade: The NC3220 grade offers significantly improved coating adhesion over previous generations. This translates to more predictable tool wear and a much higher resistance to catastrophic edge failure in 4.0mm parting and grooving tasks.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN400-M |
| Insert Width (w) | 4.0 mm (+/- 0.03) |
| Grade | NC3220 (Professional Universal Steel - CVD) |
| Target Industry | Automotive, Oil & Gas, General Machining |
Core Performance Benefits:
- Advanced Heat Shield: The premium CVD coating acts as a superior thermal barrier for 4mm wide grooves.
- Next-Gen Stability: NC3220 provides a balanced substrate that excels in both continuous and light-interrupted cuts.
- High-Rigidity Design: The 4.0mm cross-section minimizes vibration in deep radial plunges, ensuring straighter parting.
- Precision Chip Control: The -M geometry effectively evacuates wide chips, preventing tool-damaging chip re-cutting.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (1045) | 120 - 230 m/min | 0.10 - 0.25 mm/rev |
| Alloy Steel (4140) | 100 - 190 m/min | 0.08 - 0.20 mm/rev |
| Structural/Mild Steel | 140 - 260 m/min | 0.12 - 0.30 mm/rev |
Compatible Tool Holders:
To handle the torque of 4.0mm inserts, high-rigidity MGEHR/L holders are recommended:
- External Holders: MGEHR 2020-4 / 2525-4 / 3232-4
Upgrade Insight: NC3220 vs. NC3120/NC3020
For 4.0mm widths, NC3220 represents the current industry standard for reliability:
The Pro Evolution. Offers superior life in high-speed CNC applications. Use this as your primary choice for all steel work to reduce downtime.
The Legacy Reliable. Still excellent for general use, but NC3220 is recommended for newer machines and higher surface speeds.
Machinist's Pro Tip: With the MGMN400-M NC3220, the key to success is chip evacuation. In deep grooves, ensure high-pressure coolant is hitting the chipbreaker to roll the chips tightly. If you see "blue chips," don't panic—the NC3220 coating is designed to thrive at those high temperatures.
Packaging: 10 pieces per box.
Korloy MGMN400-M NC3220 price, 4.0mm high performance steel parting insert, MGMN400-M cutting speed and feed guide, best 4mm grooving tool for alloy steel, NC3220 vs NC3120 for 4mm widths
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.