Korloy MGMN400-02-R NC3020 4mm R0.2 Right-Hand Steel Grooving Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MGMN400-02-R NC3020 is a high-reliability 4.0mm Right-Hand Profiling and Grooving Insert. Specifically designed for Steel (P) finishing to semi-finishing, this insert utilizes the NC3020 CVD coating, known for its exceptional balance of surface smoothness and wear resistance. With its precise 0.2mm corner radius (R0.2) and optimized chipbreaker, it is the professional choice for machining complex steel profiles where dimensional stability and high-quality surface finish are the top priorities.
The Finishing Specialist: NC3020 is engineered for stability. Its smooth CVD surface minimizes friction, effectively preventing "built-up edge" during steel turning. This makes the MGMN400-02-R ideal for high-precision 4.0mm profiling jobs where you need the tool to hold its size over hundreds of parts.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN400-02-R |
| Width / Radius | 4.0 mm / R0.2 |
| Direction | Right-Hand (-R) |
| Grade | NC3020 (Universal Steel CVD) |
Core Performance Benefits:
- Enhanced Surface Finish: The NC3020 coating technology ensures a low coefficient of friction, resulting in superior part aesthetics.
- Precision Corner Control: The R0.2 radius is perfect for clearing sharp 90-degree corners and intricate profiling details.
- Stable Wear Pattern: Designed to wear predictably, allowing for accurate tool-offset management in automated CNC production.
- Rigid 4mm Body: The wider insert body absorbs vibration better than narrower inserts during deep profiling cuts.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Low Carbon Steel (1020) | 140 - 220 m/min | 0.05 - 0.15 mm/rev |
| Alloy Steel (4140) | 110 - 180 m/min | 0.04 - 0.12 mm/rev |
| Cast Iron (Gray) | 120 - 190 m/min | 0.06 - 0.16 mm/rev |
Compatible Tool Holders:
Precision fit for standard 4.0mm seat Right-Hand tool systems:
- External Holders: MGEHR 2020-4 / 2525-4
- Internal Holders: MGIVR 3125-4 / 4032-4
Production Tip: NC3020 vs. NC3030
Both are CVD steel grades, but they excel in different scenarios:
The Precision Choice. Optimized for higher speeds and better surface finish. It is more resistant to built-up edge and abrasive wear in continuous cuts.
The Tough Choice. Better for heavy-duty applications or slightly interrupted cuts. It sacrifices a bit of speed for increased edge toughness.
Machinist's Pro Tip: For MGMN400-02-R NC3020, if you are experiencing chatter during profiling, check your holder overhang. Because NC3020 is a harder CVD grade, it performs best when the setup is extremely rigid.
Packaging: 10 pieces per box.
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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.