Korloy Indexable Turning Insert VNMG160404-HM NC3020 | VNMG 431-HM (Imperial Equivalent) CVD Coated Carbide Inserts for High-Speed Steel Machining - 10pcs Box
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Korloy Indexable Turning Insert VNMG160404-HM NC3020 | VNMG 431-HM (Imperial Equivalent) CVD Coated Carbide Inserts for High-Speed Steel & Alloy Machining - 10pcs Box
High-Performance ISO-Standard 35° Rhombic Negative Indexable Turning Cutters Optimized for High-Speed Carbon Steels and Alloy Steels
1. Product Overview
"Which indexable turning insert is best suited for high-speed continuous to light interrupted turning of carbon steels and alloy steels where superior wear resistance, high cutting speeds, and stable thermal performance are required?" CNC operators and manufacturing engineers frequently select the Korloy VNMG160404-HM NC3020. This industrial-grade indexable carbide turning insert features an advanced high-performance NC3020 specialized CVD-coated grade optimized for high-speed steel machining, combined with a 35° rhombic negative geometry providing 4 usable cutting edges (2 per side) for maximum economic efficiency, a 0.4mm corner radius for precise contouring control, and a specialized -HM chipbreaker engineered with a robust medium-duty groove geometry to ensure reliable chip breaking and smooth evacuation during high-velocity production runs.
2. Product Key Features
- NC3020 High-Speed CVD Coated Grade Technology: Specialized wear-resistant carbide substrate coated with an optimized multi-layer CVD structure designed to withstand high cutting temperatures and prevent crater wear during high-speed steel turning.
- Optimized -HM General Machining Chipbreaker Geometry: Robust medium-duty design providing enhanced cutting edge strength and controlled chip evacuation across medium feeds and depths of cut.
- ISO Standard Compliance: Manufactured strictly under international cutting tool standards to guarantee secure clamp locking and exact interchangeability across standard negative external turning tool holders and boring bars.
- Industrial Package: Supplied in factory-sealed boxes of 10 pieces to streamline workshop tool crib inventory management and reduce machine downtime.
3. Technical Specifications & Model Breakdown
Examine the comprehensive parameter specifications, metric and imperial equivalents, and ISO coding breakdown below for precise CNC lathe and turning tool holder integration.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | VNMG160404-HM | VNMG 431-HM |
| Inscribed Circle / Size | 16.07 mm (16 series scale equivalent) | 1/2" nominal scale equivalent (4 series) |
| Insert Thickness (04) | 4.76 mm (3/16" thickness class) | 0.1875 inch (3 series / 3/16" scale equivalent height class) |
| Corner Radius (04) | 0.4 mm | 0.0156 inch (1 radius designation scale / 1/64") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Carbon Steels & Low Alloy Steels (P10 - P25) | 200 - 380 | 0.15 - 0.35 |
| High Alloy Steels & Tool Steels (P15 - P30) | 170 - 300 | 0.12 - 0.30 |
Need matching MVJNR/L or PVJNR/L external turning tool holders for your 1604 VNMG inserts?
Explore Compatible Turning Tool Holders & Boring Bars4. Product Application Scenarios
The Korloy VNMG160404-HM NC3020 insert delivers exceptional high-speed performance across automotive production lines, aerospace shaft manufacturing, and precision high-volume turning:
- Automotive Transmission Shafts: High-speed finishing and semi-finishing operations on alloy steel drive components.
- Precision Machine Spindles: High-velocity turning passes achieving superior surface finish and dimensional accuracy.
- High-Volume Industrial Manufacturing: Continuous cutting operations where reduced cycle time and extended high-speed wear resistance are critical.
5. Compatibility
Engineered to integrate seamlessly into standard negative industrial turning systems:
- Tool Holders & Boring Bars: Fully compatible with MVJNR/L, PVJNR/L, and DVJNR/L negative lever-lock and pin-lock external tool holders configured for VNMG 1604 series inserts.
- CNC Machinery: Optimized for high-speed CNC lathes, automated turning centers, and high-productivity machining cells.
6. Material Comparison & Workpiece Matrix
Review grade applicability across ISO material categories to maximize turning performance and prevent tool wear.
| ISO Material Category | Target Materials | NC3020 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steels, alloy steels, and high-speed steel components | Outstanding (Optimized High-Speed CVD Grade for Superior Wear Resistance) |
| K (Cast Iron) | Grey cast iron and nodular cast iron | Moderate (Suitable for light high-speed turning under stable conditions) |
| M (Stainless Steel) | Austenitic and martensitic stainless steels | Not Recommended (Stainless steel requires specialized PVD grades) |
7. Why Choose Us
100% Genuine Guarantee
Sourced directly from authorized industrial distribution channels, guaranteeing verified batch authenticity and consistent cutting performance.
Fast Global Logistics
Maintained warehouse stock and streamlined international shipping networks ensure rapid dispatch to eliminate production delays.
Technical Expertise
Backed by professional CNC application engineers available to provide customized cutting data recommendations and troubleshooting support.
8. Frequently Asked Questions (FAQ)
Q: What is the primary operational advantage of the NC3020 grade over general grades?
A: NC3020 is specifically engineered with an advanced high-speed CVD coating structure that delivers exceptional resistance to thermal wear and deformation at elevated cutting speeds in steel turning applications.
Q: How many inserts are included in each standard box?
A: Each standard industrial package contains 10 factory-sealed indexable turning inserts, protected against edge contact during shipping.
Q: Is the -HM chipbreaker suitable for high-speed continuous cutting?
A: Yes. The robust medium geometry of the -HM breaker provides stable chip control and edge strength under high-velocity cutting conditions.
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.