KORLOY TNMG220408-HM NC3020 Indexable Carbide Turning Inserts | TNMG432-HM (ANSI Equivalent) CVD Coated Carbide Cutters for High-Speed Steel Machining - 10pcs/box
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KORLOY TNMG220408-HM NC3020 Indexable Carbide Turning Inserts | TNMG432-HM (ANSI Equivalent) CVD Coated Inserts for High-Speed Steel Machining - 10pcs/box
High-Performance ISO-Standard 60° Triangular Negative Indexable Turning Cutters Optimized for High-Speed Roughing and Continuous Machining of Carbon and Alloy Steels
1. Product Overview
"Which carbide turning insert delivers maximum wear resistance and thermal stability for high-speed continuous roughing and finishing of structural and alloy steels?" CNC machinists and manufacturing engineers consistently select the KORLOY TNMG220408-HM NC3020. This industrial-grade indexable carbide insert combines an advanced NC3020 grade multi-layer CVD coating over a wear-resistant tungsten carbide substrate, delivering exceptional performance under high cutting velocities. Built with a 60° triangular negative geometry for double-sided economic indexing, a specialized -HM chipbreaker for wide-range roughing versatility, and a robust 0.8mm corner radius for enhanced edge strength during heavier cuts, it incorporates specialized rake geometries designed to ensure smooth chip evacuation and prevent crater wear during extended machining operations.
2. Product Key Features
- Advanced NC3020 CVD Coating Technology: Multi-layer coating architecture engineered for high-speed cutting velocities and medium-to-heavy roughing applications with outstanding resistance to flank wear.
- HM Chipbreaker Geometry & 0.8mm Radius: Features a double-sided positive rake land configuration combined with a robust 0.8mm nose radius for high feed stability and exceptional chip control across steel profiles.
- ISO Standard Compliance: Manufactured strictly under international cutting tool standards to guarantee secure clamping and exact interchangeability across standard negative external toolholders.
- Industrial Box Packaging: Supplied in factory-sealed boxes of 10 pieces to streamline tool crib 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 integration.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | TNMG220408-HM | TNMG432-HM |
| Inscribed Circle (IC) | 12.7 mm | 0.500 in (1/2") |
| Insert Thickness (S) | 4.76 mm | 0.1875 in (3/16") |
| Corner Radius (r) | 0.8 mm | 0.0315 in |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Carbon Steel (< 0.5% C) | 200 - 350 | 0.22 - 0.50 |
| Alloy Steel (Low/Medium Alloy) | 160 - 280 | 0.18 - 0.42 |
Need matching MTJNR, PTJNR, or WTJNR external turning toolholders for your TNMG 2204 inserts?
Explore Compatible External Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY TNMG220408-HM NC3020 insert excels across high-speed industrial manufacturing sectors:
- Automotive Component Turning: High-speed mass production turning of steel drive axles and transmission components.
- Industrial Machinery Manufacturing: Continuous roughing and semi-finishing passes on large structural steel bars and forgings.
- High-Velocity CNC Turning Cells: Automated lathe operations demanding superior wear resistance and predictable tool life.
5. Compatibility
Engineered for seamless integration into standard negative turning systems:
- Toolholders & Boring Bars: Fully compatible with MTJNR/L, PTJNR/L, and WTJNR/L series external turning toolholders and internal boring bars configured for TNMG 2204 inserts.
- CNC Machinery: Optimized for high-speed CNC lathes, automated turning centers, and heavy-duty production lines.
6. Material Comparison & Workpiece Matrix
Review grade applicability across ISO material categories to maximize turning performance.
| ISO Material Category | Target Materials | NC3020 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steels, alloy steels, and structural steel billets | Outstanding (Optimized CVD Multi-Layer Grade for P10–P30 High-Speed Continuous Turning & Roughing) |
| M (Stainless Steel) | Austenitic stainless steels | Limited (Dedicated M-class grades recommended) |
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: How many inserts are included in one standard box?
A: Each standard factory-sealed box contains exactly 10 pieces of TNMG220408-HM NC3020 inserts.
Q: When should I choose NC3020 over a tougher grade like NC3120?
A: Choose NC3020 when your application involves high cutting speeds and continuous or stable cutting conditions on steel, where maximizing flank wear resistance and thermal stability is critical.
Q: What is the benefit of the -HM chipbreaker profile?
A: The -HM breaker provides a robust cutting edge combined with wide chip control grooves, making it ideal for medium-to-heavy roughing cuts across diverse steel grades.
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.