Korloy MGMN250-G NC3030 2.5mm Double-Ended Tough 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 NC3030 is a specialized 2.5mm Double-Ended Grooving Insert engineered for Impact Resistance and Stability. This 2.5mm intermediate width provides significantly better lateral rigidity than 2.0mm versions, making it ideal for deeper grooves where tool deflection must be minimized. Paired with the NC3030 CVD grade, it is the ultimate "safety-first" tool for machining Carbon and Alloy Steels in unstable conditions or during heavy interrupted cutting.
Built for Toughness: NC3030 is Korloy's most durable CVD grade for steel. If you are grooving through forgings, hex bars, or parts with pre-drilled holes, this insert provides the necessary edge strength to prevent catastrophic chipping.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN250-G |
| Insert Width (w) | 2.5 mm |
| Grade | NC3030 (Ultra-Tough CVD Coating) |
| Chipbreaker | -G (Reinforced Edge for General Use) |
Core Performance Benefits:
- Maximum Edge Reliability: The specialized substrate resists crack propagation, protecting the 2.5mm tip from breakage during sudden impacts.
- High Shock Resistance: Optimized for non-continuous cutting, such as machining splines, keyways, or hexagonal bars.
- Double-Ended Economy: Features two usable cutting edges, offering excellent cost-per-part value for roughing and parting-off.
- Optimized 2.5mm Kerf: Provides a perfect balance between tool rigidity and material savings compared to 3.0mm inserts.
Recommended Cutting Parameters:
| Operation Type | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Steel (Continuous) | 110 - 190 m/min | 0.05 - 0.16 mm/rev |
| Steel (Interrupted) | 80 - 140 m/min | 0.05 - 0.12 mm/rev |
| Rough Forgings | 70 - 130 m/min | 0.06 - 0.14 mm/rev |
Compatible Tool Holders:
Ensure your holder blade width matches the 2.5mm insert exactly for proper clamping:
- External Holders: MGEHR 1616-2.5 / 2020-2.5 / 2525-2.5
Steel Machining Logic: NC3030 vs. NC3020
At the 2.5mm width, selecting based on machine stability is vital:
The Toughness Specialist. First choice for interrupted cuts and unstable setups. Use this if your current inserts are snapping or chipping prematurely.
The Wear Specialist. Best for high-speed, continuous cutting on stable machines. Offers longer tool life when the cut is smooth and consistent.
Machinist's Pro Tip: For the MGMN250-G, the 2.5mm width requires precise alignment. Always ensure the center height is exact to maximize the toughness benefits of the NC3030 grade, especially when parting-off to the center of a bar.
Packaging: 10 pieces per box.
Korloy MGMN250-G price, 2.5mm grooving insert for interrupted steel cut, MGMN250-G NC3030 cutting parameters, best 2.5mm parting insert for lathe, shock resistant grooving insert steel
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.