Korloy MRMN300-M NC3020 3mm Full Radius R1.5 CVD Steel Profiling Insert (10pcs)
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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