KORLOY TNMX160404L NC3120 Indexable Carbide Turning Inserts | TNMX331L (ANSI Equivalent) CVD Coated Carbide Cutters for Left-Hand Steel Machining - 10pcs/box
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KORLOY TNMX160404L NC3120 Indexable Carbide Turning Inserts | TNMX331L (ANSI Equivalent) CVD Coated Inserts for Left-Hand Steel Machining - 10pcs/box
High-Performance ISO-Standard 60° Triangular Negative Left-Hand Indexable Turning Cutters Optimized for General Carbon Steels, Alloy Steels, and Interrupted Cuts
1. Product Overview
"Which carbide turning insert delivers balanced toughness and wear resistance for left-hand general turning and interrupted cuts on structural and alloy steels?" CNC machinists and manufacturing engineers consistently select the KORLOY TNMX160404L NC3120. This industrial-grade indexable carbide insert combines an advanced NC3120 grade multi-layer CVD coating over a tough tungsten carbide substrate, delivering exceptional performance under fluctuating cutting loads. Built with a 60° triangular negative geometry for double-sided economic indexing, a specialized left-hand configuration, and a 0.4mm corner radius for precise profile finishing, it incorporates specialized chipbreaker geometries designed to ensure smooth chip evacuation and prevent thermal shock during extended machining operations.
2. Product Key Features
- Advanced NC3120 CVD Coating Technology: Multi-layer coating architecture engineered for general turning, medium roughing, and stable performance across interrupted cuts.
- Optimized Left-Hand Geometry & 0.4mm Radius: Designed specifically for left-hand external turning toolholders, featuring a precise 0.4mm nose radius for detailed profile finishing and reduced cutting forces.
- 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 | TNMX160404L | TNMX331L |
| Inscribed Circle (IC) | 9.525 mm | 0.375 in (3/8") |
| Insert Thickness (S) | 4.76 mm | 0.1875 in (3/16") |
| Corner Radius (r) | 0.4 mm | 0.0157 in |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Carbon Steel (< 0.5% C) | 180 - 300 | 0.10 - 0.25 |
| Alloy Steel (Low/Medium Alloy) | 150 - 250 | 0.08 - 0.22 |
Need matching left-hand MTJNL or PTJNL external turning toolholders for your TNMX 1604 left-hand inserts?
Explore Compatible Left-Hand Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY TNMX160404L NC3120 insert excels across precision industrial manufacturing sectors requiring left-hand orientation:
- General Component Machining: General external turning and profiling of steel forgings and castings with intermittent cuts.
- Heavy Mechanical Equipment: Left-hand turning operations on drive shafts and structural components subject to variable loads.
- Job Shop Production: Versatile general-purpose finishing and semi-finishing across multiple steel grades on CNC lathes.
5. Compatibility
Engineered for seamless integration into standard negative left-hand turning systems:
- Toolholders & Boring Bars: Fully compatible with MTJNL and PTJNL series external left-hand toolholders configured for TNMX 1604 inserts.
- CNC Machinery: Optimized for CNC lathes, flat-bed lathes, and turning centers handling general steel parts.
6. Material Comparison & Workpiece Matrix
Review grade applicability across ISO material categories to maximize turning performance.
| ISO Material Category | Target Materials | NC3120 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steels, alloy steels, and cast steels | Outstanding (Optimized CVD Multi-Layer Tough Grade for P20–P35 General Turning & Interrupted Cuts) |
| 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 TNMX160404L NC3120 inserts.
Q: What makes NC3120 different from high-speed finishing grades like NC3020?
A: The NC3120 grade features a tougher carbide substrate and a balanced CVD coating engineered to withstand thermal and mechanical shocks encountered during general turning and interrupted cuts.
Q: Is a left-hand insert mandatory for left-hand toolholders?
A: Yes, matching left-hand (L) inserts with left-hand toolholders ensures proper rake orientation, secure clamping, and correct chip flow direction.
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.