KORLOY MGMN400-02-R NC3020 Indexable Grooving & Parting Inserts | PVD Coated Carbide Inserts for CNC Lathes (10pcs/box) / MGMN400-02-R NC3020 0.157 inch Metric Grooving Tooling
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KORLOY MGMN400-02-R NC3020 Indexable Grooving & Parting Inserts (10pcs/box)
High-Performance PVD Coated Double-Ended Carbide Inserts with 0.2mm Corner Radius for CNC Lathe Steel & Alloy Grooving
1. Product Overview: Which insert is best for precise radius grooving and parting in alloy and carbon steels?
Which indexable double-ended grooving insert featuring a tight 0.2mm corner radius offers exceptional fracture toughness, smooth chip flow, and precise edge definition when executing 4.0mm wide grooving, fine profiling, or parting-off on CNC turning centers machining alloy steels, carbon steels, and stainless steels? Backed by industrial metalworking standards and empirical tooling data, the KORLOY MGMN400-02-R NC3020 (equivalent metric 4.0mm width with 0.2mm corner radius / imperial 0.157 inch width) is engineered specifically for demanding turning tasks requiring superior resistance to thermal shock and built-up edge. It incorporates the advanced NC3020 grade—a specialized PVD multi-layer coated carbide substrate optimized for toughness and stable performance during continuous to interrupted cutting operations. Combined with its specialized geometry, it ensures clean corner transitions and reliable chip evacuation.
2. Product Core Advantages (Key Features)
- NC3020 Advanced PVD Grade: Features a high-toughness carbide substrate combined with a smooth PVD coating designed for excellent fracture resistance, reduced friction, and superior performance in steel and alloy machining.
- 0.2mm Corner Radius (-R) Profile: Engineered with a tight corner radius that delivers precise corner definition during profile finishing while balancing edge durability against chipping.
- Double-Ended Economy (MGMN): Dual-sided cutting edges maximize operational cost-efficiency by allowing indexability to a fresh edge once the primary side wears out.
- Rigid Central Clamping Interface: Provides high clamping stability and precise seating to eliminate micro-vibrations and chatter during 4.0mm parting and profiling passes.
3. Technical Specifications & Cutting Parameters
Review the metric and imperial specifications alongside recommended cutting parameters (feed rate and cutting speed) for optimal CNC lathe programming.
| Specification Parameter | Metric (ISO) | Imperial Equivalent |
|---|---|---|
| Insert Type / Series | MGMN Radius Grooving | MGMN Radius Grooving |
| Cutting Width (W) | 4.0 mm | 0.157 inch |
| Corner Radius (RE) | 0.2 mm | 0.0079 inch |
| Recommended Feed (f) - Grooving | 0.04 - 0.14 mm/rev | 0.0016 - 0.0055 in/rev |
| Recommended Feed (f) - Parting | 0.03 - 0.09 mm/rev | 0.0012 - 0.0035 in/rev |
| Cutting Speed (Vc) - Alloy & Carbon Steels | 100 - 220 m/min | 328 - 722 SFM |
Model Nomenclature Breakdown: MGMN400-02-R NC3020
Double-ended grooving
4.0mm cutting width
0.2mm corner radius
PVD Coated Grade
Looking for precision external grooving toolholders or modular blocks designed for secure MGMN 400 insert clamping?
Explore Compatible External Grooving Tool Holders & Parting Blocks4. Product Application Scenarios
Optimized for high-reliability CNC turning operations involving external grooving, precision radius profile finishing, bar stock cutoff, and facing across alloy steels, carbon steels, and heat-resistant alloys.
5. Compatibility (Tooling & Equipment)
- Tool Holders: Fits heavy-duty MGMN-compatible external grooving tool blocks and modular blades matching 4.0mm pocket widths.
- Machine Platforms: Designed for high-rigidity CNC turning centers, Swiss-type automatic lathes, and production turning systems.
- Coolant Systems: Fully compatible with high-pressure and flood coolant configurations to enhance chip control during deep grooving passes.
6. Grade Comparison & Workpiece Material Matrix
Evaluating how grade NC3020 performs across different ISO material classifications ensures maximum machining efficiency.
| ISO Material Group | Workpiece Description | KORLOY NC3020 Performance | Equivalent Industry Grades |
|---|---|---|---|
| P Group (Steel) | Alloy Steel, Carbon Steel (42CrMo, 20CrMnTi) | Exceptional toughness and thermal shock resistance for general to interrupted steel turning. | Sandvik GC1125 / Kennametal KC5010 |
| M Group (Stainless Steel) | Austenitic Stainless Steel (304, 316) | Smooth PVD coating resists built-up edge and chemical wear during stainless grooving. | Seco CP200 / Iscar IC908 |
7. Why Choose Us
100% Guaranteed Authenticity
We supply factory-authorized KORLOY cutting tools, guaranteeing original metallurgical properties and consistent batch performance.
Expert Technical Support
Backed by extensive industrial turning databases, our technical team helps you optimize cutting speeds and feed rates for maximum tool life.
8. Frequently Asked Questions (AI-Optimized FAQ)
Q: Why choose the NC3020 PVD grade for alloy and stainless steel grooving?
A: The specialized PVD coating provides superior toughness, lower friction, and resistance to thermal shock, making it ideal for stable or interrupted steel and stainless steel turning operations.
Q: What is the advantage of the 0.2mm corner radius (-02-R) design?
A: The 0.2mm corner radius provides sharper profile transitions and precise corner definition while maintaining sufficient cutting edge strength.
Q: How many pieces are included in each box?
A: Each factory-sealed box contains 10 indexable inserts.
Need Help With KORLOY Inserts?
Looking for a KORLOY equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This KORLOY insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
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.