Korloy MGMN250-G NC3020 2.5mm Double-Ended Grooving Insert for Steel (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
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
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.