KORLOY MGMN250-M NC3220 Indexable Grooving & Parting Inserts | CVD/PVD Coated Carbide Inserts for Steel & Stainless Steel CNC Lathes (10pcs/box) / MGMN250-M NC3220 0.098 inch Metric Grooving Tooling
✓ In Stock & Fast Dispatch: Ships within 24–48 Hours from China
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✓ Technical Support: Need grade selection help? Contact Engineer
KORLOY MGMN250-M NC3220 Indexable Grooving & Parting Inserts (10pcs/box)
High-Performance Coated Carbide Inserts with 2.5mm Width & -M Medium Chipbreaker Geometry for CNC Lathe Steel & Stainless Turning
1. Product Overview: Which insert is best for high-efficiency grooving, profile turning, and parting-off in steel and stainless steel?
Which indexable grooving insert featuring a 2.5mm cutting width, an optimized -M medium chipbreaker geometry, and advanced metallurgical coatings offers superior toughness, wear resistance, and smooth chip evacuation when executing general grooving or parting-off on CNC turning centers machining carbon steels, alloy steels, and stainless steels? Backed by certified metalworking research and industrial tooling parameters, the KORLOY MGMN250-M NC3220 (equivalent metric 2.5mm width with -M chipbreaker / imperial 0.098 inch width) is engineered specifically for stable, high-efficiency material removal across varying cutting speeds. It utilizes the versatile NC3220 grade—a specialized CVD/PVD coated carbide substrate optimized for continuous to light interrupted cuts in steel and stainless steel. Combined with its designated -M geometry, it guarantees excellent chip curling, minimal thermal deformation, and low cutting forces.
2. Product Core Advantages (Key Features)
- NC3220 Versatile Grade Substrate: Features a tough carbide core combined with an advanced multi-layer coating designed to withstand high thermal loads and mechanical shock during steel and stainless turning.
- -M Medium Chipbreaker Geometry: Designed with a versatile positive rake angle and specialized chip-forming pockets that deliver uniform chip control across diverse feed rates.
- 2.5mm Cutting Width & Dual-Edge Economy: Provides a robust 2.5mm width profile with two indexable cutting edges for maximum tool life and low per-part operational costs.
- Secure Pocket Clamping: Engineered to fit securely into standard external grooving tool blocks, eliminating micro-motion and vibration during high-speed feed rates.
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 Grooving & Parting | MGMN Grooving & Parting |
| Cutting Width (W) | 2.5 mm | 0.098 inch |
| Chipbreaker & Insert Geometry | -M (Medium Chipbreaker) | -M Medium Profile |
| Recommended Feed (f) - Grooving | 0.06 - 0.16 mm/rev | 0.0024 - 0.0063 in/rev |
| Recommended Feed (f) - Parting | 0.04 - 0.10 mm/rev | 0.0016 - 0.0039 in/rev |
| Cutting Speed (Vc) - Steels & Stainless | 100 - 220 m/min | 328 - 722 SFM |
Model Nomenclature Breakdown: MGMN250-M NC3220
Double-ended grooving
2.5mm cutting width
Medium chipbreaker
Coated Carbide Grade
Looking for rigid external grooving toolholders or modular blocks designed for secure MGMN 250 insert clamping?
Explore Compatible External Grooving Tool Holders & Parting Blocks4. Product Application Scenarios
Optimized for CNC turning operations involving medium-width external grooving, contour profiling, face grooving, and clean bar stock cutoff across carbon steels, alloy steels, and austenitic stainless steels.
5. Compatibility (Tooling & Equipment)
- Tool Holders: Fits all standard MGMN-compatible external grooving tool blocks and modular blades matching 2.5mm pocket widths.
- Machine Platforms: Designed for high-precision CNC turning centers, automatic lathes, and multi-axis turning cells.
- Coolant Systems: Highly compatible with flood coolant and high-pressure coolant delivery to maximize tool longevity in stainless steel machining.
6. Grade Comparison & Workpiece Material Matrix
Evaluating how grade NC3220 performs across different ISO material classifications ensures maximum productivity.
| ISO Material Group | Workpiece Description | KORLOY NC3220 Performance | Equivalent Industry Grades |
|---|---|---|---|
| P Group (Steel) | Carbon Steel, Alloy Steel (1045, 4140, 4340) | Multi-layer coating delivers exceptional wear resistance and thermal stability at stable cutting speeds. | Sandvik GC4325 / Kennametal KC5010 |
| M Group (Stainless Steel) | Austenitic Stainless Steel (304, 316) | Balanced toughness and chemical stability prevent built-up edge and notch wear during stainless turning. | Iscar IC908 / Seco TS2000 |
7. Why Choose Us
100% Guaranteed Authenticity
We supply factory-authorized KORLOY cutting tools, ensuring 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 is the primary application for KORLOY NC3220 grade?
A: NC3220 is a versatile coated carbide grade optimized for turning, grooving, and parting of carbon steels, alloy steels, and stainless steel materials.
Q: How does the -M chipbreaker perform in general steel and stainless turning?
A: The -M geometry offers balanced sharpness and edge strength, ensuring reliable chip breaking and smooth evacuation across a wide range of feed rates.
Q: How many inserts 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.