Korloy MGMN600-M NC3120 6mm Double-Ended Universal Steel Grooving Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MGMN600-M NC3120 is a heavy-duty 6.0mm Double-Ended Grooving Insert engineered for Versatile Heavy Machining. When dealing with large-diameter steel bars where cutting conditions can be unpredictable, the NC3120 CVD grade stands out as the most reliable choice. It combines a heat-resistant coating with a toughened carbide substrate, making it capable of handling continuous high-speed cuts as well as the mechanical shocks common in large-scale steel production.
Built for Heavy Industry: The 6.0mm width provides massive structural integrity for deep radial plunging. NC3120's balanced profile makes it the "safe-bet" grade for shops processing a wide mix of carbon, alloy, and tool steels.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN600-M |
| Insert Width (w) | 6.0 mm |
| Grade | NC3120 (Universal Steel Grade - CVD) |
| Typical Use | Large Diameter Parting / Heavy Roughing |
Core Performance Benefits:
- Shock Absorption: NC3120 substrate is more forgiving than NC3020, significantly reducing the risk of catastrophic edge failure on large workpieces.
- Maximum Metal Removal: 6.0mm width allows for aggressive stock removal in wide-groove applications.
- Thick CVD Barrier: Protects the insert from the extreme heat generated by high-torque, wide-area cutting.
- Stable Chip Control: The -M geometry effectively rolls wide chips to prevent them from damaging the side-wall finish of deep grooves.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (Medium/Heavy) | 110 - 200 m/min | 0.15 - 0.35 mm/rev |
| Alloy Steel (4140/SCM440) | 80 - 170 m/min | 0.12 - 0.30 mm/rev |
| Mild Steel / Structural Steel | 130 - 240 m/min | 0.15 - 0.40 mm/rev |
Compatible Tool Holders:
To ensure zero deflection, pair with high-rigidity 6.0mm MGEHR/L holders:
- External Holders: MGEHR 2525-6 / 3232-6 / 4040-6
Finding the 6mm Balance: NC3120 vs. NC3020/NC3030
At a 6.0mm width, the cutting forces are immense. Choose based on your setup's rigidity:
The Universal Heavy-Weight. Best for general heavy-duty CNC work. It handles the vibrations of large shafts much better than harder grades.
The Productivity King. Use only if your machine is ultra-stable and your material is clean (no scale) to maximize speed.
The Tough Armor. Best for heavy interrupted cuts or older manual lathes where impact resistance is the priority.
Machinist's Pro Tip: For the MGMN600-M NC3120, ensure your coolant volume is adequate for 6mm wide chip removal. Since this grade is a generalist, it performs best when heat is consistently managed, allowing the NC3120's balanced substrate to maintain precision over hundreds of cuts.
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.