KORLOY SNMG120404-HM NC3120 Indexable Carbide Turning Inserts | SNMG431-HM (ANSI Equivalent) CVD Coated Inserts for Steel and Alloy Machining - 10pcs/box
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KORLOY SNMG120404-HM NC3120 Indexable Carbide Turning Inserts | SNMG431-HM (ANSI Equivalent) CVD Coated Inserts for Steel and General Machining - 10pcs/box
High-Performance ISO-Standard 90° Square Negative Indexable Turning Cutters Featuring NC3120 CVD Coating and -HM General Chipbreaker for Precise Steel Turning
1. Product Overview
"Which indexable turning insert is best suited for high-efficiency steel turning and reliable alloy steel machining with superior wear resistance?" CNC operators and manufacturing engineers consistently choose the KORLOY SNMG120404-HM NC3120. This industrial-grade turning insert combines a tough NC3120 CVD-coated carbide substrate with an optimized -HM chipbreaker geometry, delivering excellent chip control, low cutting forces, and extended tool life across continuous and general steel turning applications. Built upon a rigid 90° square negative outline with 8 indexable cutting edges and a precise 0.4mm corner radius, it guarantees exceptional edge stability and fine surface finish quality.
2. Product Key Features
- NC3120 CVD Coated Grade: Engineered with a robust carbide substrate and an advanced multi-layer CVD coating designed to maximize wear resistance and thermal stability when machining carbon steels, alloy steels, and cast materials.
- -HM Chipbreaker & 0.4mm Radius: Features a versatile groove geometry engineered for general-to-finishing turning operations with smooth chip evacuation, paired with a sharp 0.4mm corner radius for tight tolerance control and refined surface finishes.
- Double-Sided Indexable Economy: Square negative configuration provides 8 total indexable cutting edges (4 per side), optimizing machining economy and cost-per-edge metrics.
- Standard Industrial Packaging: Delivered in secure factory containers containing 10 pieces for efficient shop floor inventory management.
3. Technical Specifications & Model Breakdown
Review the comprehensive technical parameters, metric-to-imperial cross-references, and ISO nomenclature breakdown below.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | SNMG120404-HM | SNMG431-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) | 0.4 mm | 0.0157 in (~1/64") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Carbon Steel & Low Alloy Steel (e.g., 1045, 4140) | 150 - 300 | 0.15 - 0.35 |
| Alloy Steel & Tool Steel | 120 - 240 | 0.10 - 0.25 |
Need matching MSSNR or PSBNR external turning toolholders for your SNMG 1204 inserts?
Explore Compatible External Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY SNMG120404-HM NC3120 insert performs exceptionally well across demanding general engineering and industrial steel applications:
- Automotive Component Manufacturing: High-speed turning of drive shafts, transmission gears, and forged steel blanks.
- General Machinery & Industrial Equipment: Rough-to-finish machining of heavy structural steel frames and rotating cylinders.
- Energy & Power Generation: Production machining of high-strength alloy steel turbine connectors and structural shafts.
5. Compatibility
Engineered for universal integration with standard ISO negative toolholding systems:
- Toolholders: Fully compatible with standard MSSNR/L, PSBNR/L, and CSBNR/L pin-and-clamp external turning toolholders designed for SNMG 1204 inserts.
- Machine Equipment: Suitable for high-precision CNC lathes, turning centers, and multi-axis heavy-duty turning systems.
6. Material Comparison & Workpiece Matrix
Examine grade application suitability across ISO workpiece material classifications.
| ISO Material Category | Target Materials | NC3120 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steel, low alloy steel, and high-strength alloy steel (e.g., C45, 42CrMo4, 20Cr) | Optimal (High-Performance CVD Coated Grade Optimized for P15–P35 Steel Turning) |
| K (Cast Iron) | Gray cast iron (FC) and ductile nodular cast iron (FCD) | Conditional (Suitable for continuous turning of cast components) |
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 downtime.
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 each box?
A: Each standard factory box contains exactly 10 pieces of SNMG120404-HM NC3120 inserts.
Q: Why choose NC3120 CVD grade for general steel turning?
A: NC3120 features an advanced multi-layer CVD coating that provides superior crater wear resistance and thermal stability, making it ideal for high-speed cutting of carbon and alloy steels.
Q: Which toolholders are compatible with this SNMG 1204 insert?
A: It fits standard ISO negative turning toolholders designed for SNMG 1204 geometry, such as MSSNR or PSBNR external toolholder bars.
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.