Korloy MRMN300-M NC3020 3mm Full Radius R1.5 CVD 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 NC3020 is a heavy-duty 3.0mm Full Radius (R1.5) Profiling Insert specifically engineered for high-performance Steel (P) machining. Equipped with the advanced NC3020 CVD coating, this insert is optimized for continuous cutting at high speeds, providing a significant boost in productivity. The Full Radius (Round Nose) geometry combined with the -M chipbreaker ensures smooth chip flow and reduced vibration during complex contouring of carbon steels and alloy steels.
Superior Wear Resistance: NC3020 is a high-performance CVD grade that features a smooth, thick coating layer. It is designed to resist crater wear and heat deformation, making it the ideal choice for stable and long-running production cycles in general steel materials.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MRMN300-M |
| Insert Shape | Full Radius (Round Nose) |
| Width / Radius | 3.0 mm / R1.5 |
| Grade | NC3020 (Premium Steel CVD) |
Core Performance Benefits:
- Precise Full Radius (R1.5): Designed for flawless 3D profiling, deep circular grooves, and large corner radii transitions.
- CVD Multi-Layer Coating: Offers unmatched heat resistance, allowing for higher cutting speeds (Vc) compared to PVD grades.
- -M Chipbreaker Stability: Optimized for mid-range feeds, providing excellent chip breaking and preventing long, stringy chips in mild steel.
- Extended Tool Life: The tough substrate paired with CVD coating ensures reliable performance in mass production of steel shafts and gears.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (S45C / 1045) | 140 - 240 m/min | 0.08 - 0.20 mm/rev |
| Alloy Steel (42CrMo / 4140) | 110 - 190 m/min | 0.06 - 0.16 mm/rev |
| Free Cutting Steel | 160 - 280 m/min | 0.10 - 0.25 mm/rev |
Compatible Tool Holders:
Precision 3.0mm seat fit for standard MGEHR/MGIVR systems:
- External Holders: MGEHR 2020-3 / 2525-3 / 3232-3
- Internal Holders: MGIVR 2520-3 / 3125-3
Machinist Tip: Why choose MRMN300-M NC3020?
Understanding the difference between CVD and PVD for 3mm Full Radius:
The Mass Production King. Optimized for dry or wet high-speed cutting in stable setups. Ideal for long-reach profiling where heat resistance is paramount.
The Universal Problem Solver. Best for stainless steel, interrupted cuts, or small batch jobs where you need maximum edge toughness across multiple materials.
Pro Advice: For MRMN300-M NC3020, don't be afraid to increase the cutting speed. CVD grades perform better when they reach their optimal operating temperature. If you see built-up edge, increase your Vc!
Packaging: 10 pieces per box.
Korloy MRMN300-M price, 3mm full radius insert for steel profiling, NC3020 CVD grooving insert, R1.5 round nose insert for CNC lathe, 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.