Korloy MGMN300-M NC3220 3mm 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 MGMN300-M NC3220 represents the pinnacle of Universal Steel Machining technology. As the latest evolution in Korloy's steel grade lineup, the NC3220 CVD grade is engineered to outperform traditional grades in tool life and reliability. This 3.0mm Double-Ended insert is designed for modern CNC workshops that demand consistent results across a wide variety of carbon and alloy steels, ensuring maximum machine uptime and superior surface finishes.
The New Professional Standard: NC3220 features an upgraded multi-layer coating with enhanced adhesion. This means fewer edge chipping incidents and significantly longer intervals between insert changes compared to the classic NC3120 grade.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN300-M |
| Insert Width (w) | 3.0 mm (+/- 0.02) |
| Grade | NC3220 (Next-Gen Universal Steel - CVD) |
| Chipbreaker | -M (Stable Medium-Cutting Geometry) |
Core Performance Benefits:
- Enhanced Edge Toughness: New coating technology prevents micro-chipping even at higher cutting speeds.
- Superior Thermal Management: The NC3220 substrate effectively handles the heat buildup typical in 3.0mm wide parting.
- Versatile P-Group Performance: One grade for all steels—from soft low-carbon to high-tensile alloy steels.
- Optimized Chip Control: The -M chipbreaker ensures chips are narrow and curled for easy evacuation in deep grooves.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (1045 / 45#) | 130 - 250 m/min | 0.08 - 0.22 mm/rev |
| Alloy Steel (4140 / 4340) | 110 - 210 m/min | 0.06 - 0.18 mm/rev |
| Mild Steel (Low Carbon) | 150 - 280 m/min | 0.10 - 0.25 mm/rev |
Compatible Tool Holders:
Pairs perfectly with standard 3.0mm MGEHR/L or MGIVR tool bars:
- External Holders: MGEHR 1616-3 / 2020-3 / 2525-3
- Internal Holders: MGIVR 2016-3 / 2520-3
Smart Upgrade: NC3220 vs. NC3120
Choosing the right 3mm grade for your steel production:
The New Champion. Offers superior coating adhesion. Best for high-efficiency CNC production where tool life and stability are the top priorities.
The Reliable Classic. Still an excellent universal grade, but suited for standard speeds. NC3220 is the recommended upgrade for modern machines.
Machinist's Pro Tip: For the MGMN300-M NC3220, don't be afraid to push the cutting speed ($Vc$). This grade thrives in high-heat environments where older grades might fail. Ensure your coolant is clean and directed at the tip for maximum performance.
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.