Korloy MGMN250-G NC3020 2.5mm Double-Ended Grooving Insert for Steel (10pcs)
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The Original Korloy MGMN250-G NC3020 is a high-performance 2.5mm Double-Ended Grooving Insert engineered for stability and efficiency. The 2.5mm width fills the gap between standard 2mm and 3mm inserts, offering increased blade strength for deeper grooves while minimizing material loss during parting-off. Powered by the NC3020 CVD grade, this insert excels in continuous steel machining, providing superior resistance to crater wear and heat deformation at high cutting speeds.
Optimized Geometry: The -G (General) chipbreaker features a reinforced cutting edge that stabilizes chip flow during radial plunging. This ensures that even in tough alloy steels, chips are curled and broken efficiently, protecting both the tool and the workpiece surface.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN250-G |
| Insert Width (w) | 2.5 mm |
| Grade | NC3020 (Premium CVD for Steel) |
| Design | Double-Ended (2 Cutting Edges) |
Core Performance Benefits:
- Enhanced Rigidity: The 2.5mm width offers significantly more lateral stability than 2.0mm inserts, reducing the risk of vibration in deeper grooves.
- NC3020 Efficiency: Designed for high surface speeds (Vc), allowing you to decrease cycle times in stable production environments.
- Excellent Edge Retention: The CVD coating technology ensures the cutting edge remains sharp even under the high temperatures of continuous steel turning.
- Versatile Application: Perfect for a wide range of steels, from low-carbon to high-tensile alloy steels.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel | 130 - 230 m/min | 0.05 - 0.16 mm/rev |
| Alloy Steel | 100 - 190 m/min | 0.05 - 0.14 mm/rev |
| Cast Iron (Finishing) | 100 - 180 m/min | 0.08 - 0.18 mm/rev |
Compatible Tool Holders:
Ensure you use a holder specifically designed for 2.5mm width inserts:
- External Holders: MGEHR 1616-2.5 / 2020-2.5 / 2525-2.5
The 2.5mm Strategy: NC3020 vs. NC3030
Grade selection is the key to preventing tool failure in 2.5mm grooving:
Best for Speed. If your lathe is modern and the cut is continuous (no holes or hex shapes), NC3020 will give you the longest life at higher RPMs.
Best for Shock. If you are machining raw forged parts or have interrupted cuts, the NC3030 grade is safer as it resists chipping better than NC3020.
Machinist's Pro Tip: When using the MGMN250-G, always verify that your holder’s blade width matches the insert exactly. Using a 3mm holder for a 2.5mm insert will lead to poor clamping and immediate breakage.
Packaging: 10 pieces per box.
Korloy MGMN250-G price, 2.5mm width grooving insert, MGMN250-G cutting speed and feed, high speed parting insert for alloy steel, CVD coated 2.5mm lathe grooving tip