Korloy MGMN250-M NC3030 2.5mm Double-Ended Tough Steel Grooving Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MGMN250-M NC3030 is a high-toughness 2.5mm Double-Ended Grooving Insert specifically engineered for Steel Parting and Grooving under Demanding Conditions. While thinner inserts might struggle with lateral forces, the 2.5mm width offers enhanced stability. The NC3030 CVD grade is optimized for impact resistance, making it the premier choice for machining carbon steels and alloy steels where interrupted cuts, scale, or vibrations are present.
Built for the Real World: NC3030 is designed to survive where other inserts fail. Its multi-layer CVD coating acts as a thermal and mechanical shield, allowing the insert to handle the repetitive shocks of interrupted grooving (like hex bars or keyed shafts) without premature edge failure.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN250-M |
| Insert Width (w) | 2.5 mm |
| Grade | NC3030 (Maximum Toughness CVD) |
| Chipbreaker | -M (Stable for Medium Feeds) |
Core Performance Benefits:
- Shock Absorption: The specialized carbide substrate is designed to prevent sudden breakage during interrupted cuts or unstable setups.
- Thick CVD Coating: Provides excellent resistance to flank wear and crater wear at medium cutting speeds.
- Enhanced Rigidity: The 2.5mm width bridges the gap between material economy and structural strength, reducing tool deflection.
- Double-Ended ROI: Two usable cutting edges ensure you get the maximum value out of every insert.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Low Carbon Steel (1018/1020) | 90 - 180 m/min | 0.06 - 0.16 mm/rev |
| Alloy Steel (4140/4340) | 70 - 150 m/min | 0.05 - 0.14 mm/rev |
| Forged Steel / Cast Steel | 60 - 130 m/min | 0.06 - 0.12 mm/rev |
Compatible Tool Holders:
Must be used with dedicated 2.5mm width MGEHR/L holders:
- External Holders: MGEHR 1616-2.5 / 2020-2.5 / 2525-2.5
The Toughness Shield: NC3030 vs. NC3120
For 2.5mm steel grooving, choosing the right "Armor" is critical:
The Tough One. Best for interrupted cuts, heavy shocks, and manual lathes. It trades some high-speed wear resistance for maximum anti-breakage security.
The Balanced One. Best for continuous CNC cuts and higher speeds. Offers more wear resistance but is more brittle if the tool hits an interruption.
Machinist's Pro Tip: If your MGMN250-M NC3030 shows chipping on the edge, consider reducing your feed rate slightly or ensuring your coolant is hitting the pocket directly. If the insert is surviving but wearing out too fast on the sides, try moving to the NC3120 grade.
Packaging: 10 pieces per box.
Korloy MGMN250-M NC3030 price, 2.5mm insert for interrupted grooving, MGMN250-M feeds and speeds for alloy steel, NC3030 vs NC3120 toughness, heavy duty 2.5mm parting insert
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.