TaeguTec CCMT120408PC TT8115 | High-Speed Steel Turning Insert
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TaeguTec CCMT120408PC TT8115
The High-Velocity Specialist: Maximum Wear Resistance for Large-Scale Steel Finishing
Product Overview
"Which insert is best for maximizing cycle times in high-speed finishing of carbon and alloy steels while maintaining a robust edge?"
The TaeguTec CCMT120408PC TT8115 is an 80° rhombic positive insert engineered for high-velocity ISO P (Steel) turning. Featuring the ultra-hard TT8115 CVD coating, this grade is designed for peak performance in continuous cutting where heat and abrasive wear are most intense. The PC (Precision Cutting) chipbreaker, combined with a reinforced 0.8mm corner radius, provides an ideal balance of sharp cutting action and mechanical strength, ensuring exceptional surface finishes and long-term dimensional stability.
Key Features
Advanced CVD technology with superior crater wear resistance for high-surface speed operations.
Specifically designed to minimize cutting forces and ensure excellent chip control at light depths of cut.
Provides a more robust edge compared to smaller radii, perfect for stable finishing with higher feed capability.
Technical Specifications
ISO Code Decoding: CCMT120408PC
80° Rhom.
7° Relief
Tolerance
Fixing
12.9mm L
4.76mm S
0.8mm Rad.
Chipbreaker
| Unit System | Designation | IC (Inscribed Circle) | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | CCMT120408PC | 12.7 mm | 0.8 mm |
| Imperial (ANSI) | CCMT432PC | 0.500" | 0.031" |
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel | 250 - 550 m/min | 0.10 - 0.25 mm/rev |
| Alloy Steel | 200 - 450 m/min | 0.08 - 0.22 mm/rev |
Compatible Holders
This insert is designed for standard SCLCR/L 12 external holders and S-SCLCR/L 12 boring bars.
Product Applications
- High-speed finishing of transmission shafts and hydraulic components.
- Precision turning of steel flanges and machine components.
- High-volume production where tool change downtime must be minimized.
- Boring operations requiring consistent dimensional control at high temperatures.
TaeguTec Grade Benchmarking
| Grade Name | Coating Strategy | Primary Application |
|---|---|---|
| TT8115 (CVD) | High Wear Resistant CVD | High Speed: Peak productivity in steel. |
| TT8125 (CVD) | Balanced Toughness CVD | Universal: General purpose steel turning. |
Why Choose TaeguTec?
TaeguTec, a member of the IMC Group, is a world leader in high-performance metallurgy. The TT8115 grade represents the ultimate in CVD coating technology, allowing manufacturers to push machine limits for maximum cycle time reduction. By choosing TaeguTec, you are utilizing South Korean precision engineering that focuses on reducing cost-per-part and eliminating secondary finishing processes, directly improving your shop's bottom line.
Verified Global Feedback
"Maximum productivity"
We switched to TT8115 for high-speed finishing on 4140 steel. Tool life is significantly higher than other CVD grades at 400 m/min.
— Machining Solutions Inc. (USA)"Beste Standzeit"
Very consistent tool wear. The PC chipbreaker ensures chips are controlled even at very high velocities.
— Präzisionstechnik GmbH (Germany)"Excellent for mass production"
Reliable performance across thousands of parts. The 0.8mm radius gives a very stable finish.
— Precision Works (Italy)Frequently Asked Questions
1. Is TT8115 suitable for interrupted cuts?
TT8115 is a high-hardness grade. It is best suited for continuous cuts. For interruptions, the TT8125 grade is recommended.
2. Why use a 0.8mm radius instead of 0.4mm?
The 0.8mm radius (032) provides superior edge strength and allows for higher feed rates while maintaining a smooth surface finish.
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.