Korloy MRMN300-M NC3030 3mm Full Radius R1.5 Steel Profiling Insert (10pcs)
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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