Korloy MRMN600-M NC3020 6mm Full Radius R3.0 Heavy Duty Steel Profiling Insert (10pcs)
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The Original Korloy MRMN600-M NC3020 is a high-capacity 6.0mm Full Radius (R3.0) Profiling Insert, engineered specifically for heavy-duty Steel (P) machining. Featuring the industry-standard NC3020 CVD coating, this insert is built to dominate high-speed production lines where heat resistance and tool longevity are critical. The massive 6mm wide Full Radius (Round Nose) geometry, paired with the -M (Medium) chipbreaker, allows for aggressive material removal and exceptional stability when machining large profiles on carbon and alloy steels.
Heavy-Duty Productivity: The NC3020 grade is optimized for high-speed continuous cutting. Its thick, smooth CVD layer acts as a powerful thermal shield, allowing you to maintain high cutting speeds on large-diameter workpieces while significantly extending tool life compared to standard PVD grades.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MRMN600-M |
| Insert Shape | Full Radius (Round Nose) |
| Width / Radius | 6.0 mm / R3.0 |
| Grade | NC3020 (Premium Steel CVD) |
Core Performance Benefits:
- Maximum Metal Removal Rate (MRR): The 6.0mm width allows for deeper and wider cuts, drastically reducing cycle times on large components.
- CVD Thermal Barrier: Superior resistance to heat buildup, making it ideal for dry cutting or high-speed machining of hardened steels.
- Stabilized -M Chipbreaker: Designed to break chips effectively at higher feed rates, preventing dangerous "bird-nesting" on large CNC lathes.
- Precision R3.0 Geometry: Delivers flawless transitions for large rounded grooves and heavy-duty 3D contouring.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Medium Carbon Steel (S45C) | 120 - 220 m/min | 0.12 - 0.35 mm/rev |
| Alloy Steel (42CrMo/SCM440) | 100 - 180 m/min | 0.10 - 0.28 mm/rev |
| Cast Steel / Heavy Castings | 90 - 160 m/min | 0.15 - 0.40 mm/rev |
Compatible Tool Holders:
Precision 6.0mm seat for heavy-duty holder systems:
- External Holders: MGEHR 2525-6 / 3232-6 / 4040-6
- Internal Holders: MGIVR 4032-6 / 5040-6
Machinist Tip: Why MRMN600-M NC3020 for Large Shafts?
When machining 6.0mm wide grooves, stability and heat management are your biggest challenges:
The High-Efficiency Choice. At 6mm wide, the contact area is huge. NC3020’s CVD coating handles the massive friction heat much better than PVD, allowing you to run faster without burning the edge.
The Heavy Interruption Choice. If your 6mm groove is on a part with hex sections or holes, switch to PC5300 for its superior impact resistance.
Pro Advice: For MRMN600-M NC3020, the tool pressure is significant. Always use the largest possible shank size (e.g., 3232 or 4040) to prevent vibration marks and ensure the full R3.0 radius remains concentric.
Packaging: 10 pieces per box.
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