KORLOY MRMN200-M NC3020 Indexable Grooving & Parting Inserts | MRMN Series CVD Coated Carbide Inserts for CNC Lathes (10pcs/box) / MRMN200-M NC3020 0.079 inch Metric Grooving Tooling
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KORLOY MRMN200-M NC3020 Indexable Grooving & Parting Inserts (10pcs/box)
High-Durability CVD Coated Carbide Inserts for CNC Lathe Steel Grooving, Parting-Off, and General Turning Applications
1. Product Overview: Which insert is best for heavy-duty steel parting and 2.0mm grooving applications?
Which indexable grooving insert ensures exceptional wear resistance, thermal stability, and reliable chip control when executing heavy parting-off or 2.0mm grooving on CNC turning centers working with carbon steels and alloy steels? Verified by industrial metalworking standards, the KORLOY MRMN200-M NC3020 is engineered specifically for rigorous steel machining tasks that demand prolonged tool life under high cutting speeds. It features the advanced NC3020 grade—a specialized multi-layer CVD-coated carbide substrate optimized for high fracture toughness and resistance to thermal deformation during continuous or stable interrupted cuts. Combined with its precision M-type chipbreaker geometry, it controls chip formation and ensures smooth chip flow during deep grooving passes.
2. Product Core Advantages (Key Features)
- NC3020 Advanced CVD Grade: Combines a high-strength carbide substrate with a tough multi-layer CVD coating designed to resist flank wear and thermal fatigue in general steel turning.
- M-Type Chipbreaker Geometry: Designed to form tight, manageable chips that evacuate smoothly from 2.0mm wide grooves without crowding the cutting zone.
- Rigid Locating Interface: Provides exceptional clamping security and precise repeatability under heavy radial and axial cutting loads.
- Extended Tool Life: Delivers consistent and predictable wear progression during long production runs on conventional carbon and alloy steels.
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 | MRMN Grooving & Parting | MRMN Grooving & Parting |
| Cutting Width ($W$) | 2.0 mm | 0.079 inch (~5/64") |
| Recommended Feed ($f$) - Grooving | 0.03 - 0.07 mm/rev | 0.0012 - 0.0028 in/rev |
| Recommended Feed ($f$) - Parting | 0.02 - 0.06 mm/rev | 0.0008 - 0.0024 in/rev |
| Cutting Speed ($Vc$) - Carbon & Alloy Steel | 140 - 280 m/min | 460 - 920 SFM |
Model Nomenclature Breakdown: MRMN200-M NC3020
Grooving/Part geometry
2.0mm cutting width
Medium chipbreaker
CVD Coated Steel Turning Grade
Looking for precision external grooving toolholders or parting blades designed for secure MRMN 200 insert clamping?
Explore Compatible External Grooving Tool Holders & Parting Blades4. Product Application Scenarios
Designed for high-productivity CNC lathe operations including external OD grooving, face grooving, bar stock parting-off, and profiling across carbon steels, alloy steels, and structural steel components under stable cutting environments.
5. Compatibility (Tooling & Equipment)
- Tool Holders: Fits standard MRMN-type external grooving tool blocks and parting blades matching 2.0mm pocket size specifications.
- Machine Platforms: Compatible with heavy-duty CNC turning centers, automatic lathes, and high-volume production lines.
- Coolant Systems: Fully compatible with flood and high-pressure coolant delivery to maximize chip evacuation during 2.0mm 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) | Carbon Steel, Alloy Steel (C45, 4140, 8620) | Balanced CVD grade optimized for steady-state turning and grooving with high edge toughness and reliable wear resistance. | Sandvik GC4315 / Iscar IC9070 |
| K Group (Cast Iron) | Gray Cast Iron, Nodular Cast Iron | Performs well in stable cast iron grooving operations requiring dependable wear stability. | Kennametal KCPK20 / Kyocera PR1215 |
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: What advantages does grade NC3020 provide over harder or softer grades in steel parting?
A: NC3020 provides an optimal balance of toughness and wear resistance for general steel turning, ensuring reliable performance across continuous cutting conditions.
Q: How should feed rate be handled when breaking through the center during part-off with a 2.0mm insert?
A: It is recommended to reduce the feed rate by 40% when the insert reaches the last 0.5mm of the center axis to eliminate burrs and protect the insert tip from impact shock.
Q: How many inserts are packaged per 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.