KORLOY MGMN250-M NC3120 Indexable Grooving & Parting Inserts | CVD Coated Carbide Inserts for Steel & Alloy CNC Lathes (10pcs/box) / MGMN250-M NC3120 0.098 inch Metric Grooving Tooling
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KORLOY MGMN250-M NC3120 Indexable Grooving & Parting Inserts (10pcs/box)
High-Performance CVD Coated Carbide Inserts with 2.5mm Width & -M Medium Chipbreaker Geometry for CNC Lathe Steel & Alloy Turning
1. Product Overview: Which insert is best for high-efficiency grooving, profile turning, and parting-off in carbon and alloy steels?
Which indexable grooving insert featuring a 2.5mm cutting width, an optimized -M medium chipbreaker geometry, and advanced metallurgical coatings offers superior wear resistance, thermal stability, and smooth chip evacuation when executing general grooving or parting-off on CNC turning centers machining carbon steels, alloy steels, and structural steels? Backed by certified metalworking research and industrial tooling parameters, the KORLOY MGMN250-M NC3120 (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 advanced NC3120 grade—a specialized multi-layer CVD coated carbide substrate optimized for continuous to light interrupted cuts in steel. Combined with its designated -M geometry, it guarantees excellent chip curling, low cutting forces, and extended tool life.
2. Product Core Advantages (Key Features)
- NC3120 Advanced CVD Grade: Features a high-strength carbide substrate combined with a thick multi-layer CVD coating designed to withstand high thermal loads and abrasive wear during high-speed steel 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) - Carbon & Alloy Steels | 130 - 260 m/min | 426 - 853 SFM |
Model Nomenclature Breakdown: MGMN250-M NC3120
Double-ended grooving
2.5mm cutting width
Medium chipbreaker
CVD Coated 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 structural 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 steel machining.
6. Grade Comparison & Workpiece Material Matrix
Evaluating how grade NC3120 performs across different ISO material classifications ensures maximum productivity.
| ISO Material Group | Workpiece Description | KORLOY NC3120 Performance | Equivalent Industry Grades |
|---|---|---|---|
| P Group (Steel) | Carbon Steel, Alloy Steel (1045, 4140, 4340) | Thick CVD coating delivers exceptional wear resistance and high thermal capability for continuous steel turning. | Sandvik GC4325 / Kennametal KC9315 |
| K Group (Cast Iron) | Gray Cast Iron, Nodular Cast Iron (HT250, QT500) | Strong thermal stability and abrasive wear resistance make it highly effective for cast iron grooving operations. | Iscar IC8250 / Seco TP2500 |
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 NC3120 grade?
A: NC3120 is a dedicated CVD coated grade optimized for high-speed turning, grooving, and parting of carbon steels, alloy steels, and cast iron materials.
Q: How does the -M chipbreaker perform in general steel 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
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.