Korloy MGMN250-M NC3220 2.5mm Double-Ended Pro-Steel Grooving Insert (10pcs)
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The Original Korloy MGMN250-M NC3220 is the next-generation 2.5mm Double-Ended Grooving Insert specifically developed for High-Performance Steel Machining. Utilizing the advanced NC3220 CVD grade, this insert sets a new benchmark for tool life and reliability in CNC steel parting. It is engineered to bridge the gap between pure wear resistance and high impact toughness, making it the most stable 2.5mm solution for both continuous and general steel cutting operations.
Stability Reinvented: The NC3220 grade features a refined multi-layer coating that excels in heat dissipation. At 2.5mm wide, this insert provides superior rigidity compared to 2.0mm models, ensuring straighter cuts and better surface finish on medium-sized steel parts.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN250-M |
| Insert Width (w) | 2.5 mm |
| Grade | NC3220 (Advanced Universal Steel - CVD) |
| Main Material | Carbon Steel / Alloy Steel (P Group) |
Core Performance Benefits:
- Enhanced Thermal Resistance: NC3220’s optimized coating prevents edge softening during high-speed, continuous 2.5mm cuts.
- Balanced Substrate: Specifically designed to handle the unpredictable nature of general steel machining without micro-chipping.
- Precision Parting: The -M chipbreaker compresses and guides chips out of 2.5mm grooves efficiently, preventing surface scratches.
- Strategic ROI: Double-ended design doubles your productivity per insert while minimizing material waste compared to 3mm wide tools.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Soft Steel (1020/A3) | 140 - 240 m/min | 0.07 - 0.18 mm/rev |
| Alloy Steel (4140/SCM440) | 110 - 200 m/min | 0.06 - 0.15 mm/rev |
| Carbon Steel (1045) | 120 - 220 m/min | 0.08 - 0.20 mm/rev |
Compatible Tool Holders:
Ensure maximum clamping precision with these 2.5mm dedicated holders:
- External Holders: MGEHR 1616-2.5 / 2020-2.5 / 2525-2.5
The Next-Gen Edge: NC3220 vs. NC3120
NC3220 is the modern evolution of the universal steel grade:
The Advanced All-Rounder. Offers better coating adhesion and heat resistance than NC3120. Ideal for high-efficiency modern CNC lathes.
The Classic Generalist. A proven performer for standard steel grooving, but may wear slightly faster than NC3220 in high-heat continuous cuts.
Machinist's Pro Tip: For the MGMN250-M NC3220, the 2.5mm width is sensitive to center height. To maximize the benefits of the NC3220 grade, ensure the tool is zeroed perfectly. A center deviation of just 0.05mm can increase flank wear and shorten the life of this advanced coating.
Packaging: 10 pieces per box.
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