Korloy MRMN300-M NC3030 3mm Full Radius R1.5 Steel Profiling Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MRMN300-M NC3030 is a high-toughness 3.0mm Full Radius (R1.5) Profiling Insert specifically engineered for Steel (P) machining in demanding conditions. Featuring the specialized NC3030 CVD coating, this insert excels in interrupted cuts and machining environments where vibration or thermal shock is common. The Full Radius (Round Nose) geometry, paired with the -M (Medium) chipbreaker, provides the perfect balance of edge strength and chip control for 3D contouring of carbon and alloy steels.
Engineered for Stability: NC3030 is the "tough" brother of the NC series. Its enhanced substrate and CVD layer are designed to absorb impact, making it the ideal choice for workpieces with holes, keyways, or scaly surfaces where harder grades might chip.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MRMN300-M |
| Insert Shape | Full Radius (Round Nose) |
| Width / Radius | 3.0 mm / R1.5 |
| Grade | NC3030 (High-Toughness Steel CVD) |
Core Performance Benefits:
- Interrupted Cut Excellence: Superior edge toughness prevents brittle fractures during non-continuous cutting.
- Full Radius R1.5 Versatility: Ideal for half-round grooves, large fillets, and seamless multi-axis profiling.
- Advanced CVD Thermal Protection: Resists heat deformation and crater wear, extending tool life in alloy steel applications.
- Reliable -M Chipbreaker: Effectively manages chips at medium feed rates, ensuring a clean work environment and protecting the surface finish.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Low/Medium Carbon Steel | 110 - 210 m/min | 0.08 - 0.20 mm/rev |
| Alloy Steel (4140/42CrMo) | 90 - 170 m/min | 0.06 - 0.16 mm/rev |
| Forged Steel / Rough Surfaces | 70 - 130 m/min | 0.05 - 0.12 mm/rev |
Compatible Tool Holders:
Precision 3.0mm seat fit for standard external and internal systems:
- External Holders: MGEHR 2020-3 / 2525-3 / 3232-3
- Internal Holders: MGIVR 2520-3 / 3125-3
Machinist Tip: NC3030 vs. NC3020 for 3.0mm Profiling
When choosing MRMN300 inserts, your machine condition is the deciding factor:
The "Tough" Choice. Perfect for general steel work, interrupted cuts, or when using older CNC lathes. It prioritizes edge security and prevents sudden tool failure.
The "Fast" Choice. Best for clean, continuous cutting at high speeds in stable mass-production environments. Higher wear resistance but less impact strength.
Pro Advice: If you are machining large-diameter steel shafts with high vibration, MRMN300-M NC3030 is your best insurance policy. Maintain a constant feed rate to ensure the R1.5 radius generates a consistent surface finish.
Packaging: 10 pieces per box.
Korloy MRMN300-M price, 3mm full radius profiling insert steel, R1.5 round nose insert for interrupted cut, NC3030 CVD insert for alloy steel, MRMN300-M cutting speed and feed
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.