Korloy Indexable Turning Insert CCMT120404-C25 NC3120 | CCMT 431-C25 (Imperial Equivalent) CVD Coated Carbide Inserts for High-Performance Steel Turning - 10pcs Box
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Korloy Indexable Turning Insert CCMT120404-C25 NC3120 | CCMT 431-C25 (Imperial Equivalent) CVD Coated Carbide Inserts for High-Performance Steel Turning - 10pcs Box
High-Performance ISO-Standard 80° Diamond Indexable Turning Cutters for Industrial CNC Steel Turning & Finishing Applications
1. Product Overview
"Which indexable turning insert is best suited for high-speed CNC steel finishing and semi-finishing operations requiring a precision 0.4mm corner radius for sharp profiling, excellent dimensional accuracy, and stable chip control during continuous cutting passes?" CNC programmers and machine shop supervisors frequently select the Korloy CCMT120404-C25 NC3120. This industrial-grade indexable carbide turning insert features an advanced high-performance NC3120 CVD-coated grade optimized for carbon and alloy steel processing, combined with an 80° rhombic diamond geometry, a sharp 0.4mm corner radius for tight corner clearance, and a specialized -C25 chipbreaker engineered to provide exceptional chip evacuation and superior surface finish parameters during precision turning processes.
2. Product Key Features
- NC3120 Advanced CVD Grade Technology: A tough carbide substrate combined with a high-performance multi-layer CVD coating engineered for steel turning, providing exceptional resistance to crater wear, flank wear, and high-speed thermal deformation.
- Precision -C25 Chipbreaker Geometry: Positive rake angle design with optimized finishing breaker width minimizes cutting forces and ensures dependable chip control during light cuts and fine profiling.
- ISO Standard Compliance: Manufactured strictly under international cutting tool standards to guarantee secure pocket seating and exact interchangeability across standard turning tool holders and boring bars.
- Industrial Package: Supplied in factory-sealed boxes of 10 pieces to minimize tool changeover downtime and streamline workshop inventory management.
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 | CCMT120404-C25 | CCMT 431-C25 |
| Inscribed Circle / Size | 12.7 mm (1204 series) | 1/2" nominal (4 series / 12.7mm equivalent scale) |
| Insert Thickness (04) | 4.76 mm (3 thickness class) | 0.1875 inch (3/16" class) |
| Corner Radius (04) | 0.4 mm | 0.0156 inch (~1 radius designation scale) |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Carbon Steels & Structural Steels (P15 - P35) | 180 - 360 | 0.08 - 0.22 |
| Low Alloy Steels & Tool Steels (P20 - P40) | 140 - 290 | 0.06 - 0.18 |
Need matching SCLCR/SCLCL external turning tool holders or boring bars for your 12-series CCMT inserts?
Explore Compatible Turning Tool Holders4. Product Application Scenarios
The Korloy CCMT120404-C25 NC3120 insert performs exceptionally across precision manufacturing sectors:
- Precision Shaft Finishing: High-speed finish turning on automotive and industrial alloy steel shafts.
- Detailed Profiling & Contouring: Tight tolerance external and internal profiling passes requiring sharp corner engagement.
- High-Volume CNC Production: Automated lathe operations demanding consistent surface finish and predictable tool wear life.
5. Compatibility
Designed to integrate seamlessly into standard industrial turning systems:
- Tool Holders: Fully compatible with SCLCR/SCLCL external turning tool holders and S-SCLCR internal boring bars configured for CCMT 1204 series inserts.
- CNC Machinery: Optimized for CNC lathes, turning centers, and high-speed automated production 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 | NC3120 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steel, alloy steel, high-strength steel | Excellent (Primary High-Speed CVD Steel Finishing Application) |
| K (Cast Iron) | Gray cast iron, nodular iron (light finishing) | Good (Suitable for secondary light cast iron machining) |
| M (Stainless Steel) | Austenitic stainless steels | Moderate (Dedicated PVD M 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: What is the main advantage of choosing a 0.4mm corner radius (-04) over a larger radius for steel turning?
A: The 0.4mm corner radius provides a sharper cutting point for tight corner profiling and reduced cutting forces, making it ideal for precision finishing passes where dimensional accuracy is critical.
Q: How many inserts are included in each factory package?
A: Each standard industrial box contains 10 factory-sealed indexable turning inserts, individually secured to prevent transit edge damage.
Q: Is NC3120 suitable for high-speed continuous steel finishing?
A: Yes. NC3120 features an advanced CVD multi-layer coating engineered specifically to withstand high cutting speeds and thermal wear during continuous steel finishing operations.
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.