TaeguTec CCMT120404MT TT8115 | High-Speed CVD Turning Insert for Steel
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TaeguTec CCMT120404MT TT8115
High-Velocity Precision: The Ultimate CVD Grade for Continuous Steel Turning
Product Overview
"Which insert grade is most effective for high-speed finishing of carbon and alloy steels where heat and crater wear are the primary concerns?"
The TaeguTec CCMT120404MT TT8115 is an 80° rhombic insert engineered for ISO P (Steel) machining at elevated surface speeds. Featuring a sophisticated CVD coating with a thick Al2O3 layer, the TT8115 grade provides unparalleled thermal protection, preventing plastic deformation even during long, continuous cuts. The MT chipbreaker (Medium Turning) features a sharp yet stable edge geometry that balances low cutting forces with excellent chip control, making it the ideal choice for achieving mirror-like surface finishes on various steel workpieces.
Key Features
Optimized for high-speed (Vc) operations, significantly extending tool life in continuous cutting scenarios.
Advanced CVD multilayer coating resists high temperatures, preventing cratering and edge failure.
Sharp cutting action reduces power consumption and work hardening of the workpiece surface.
Technical Specifications
ISO Code Explanation: CCMT120404MT
80° Rhom.
7° Relief
Tolerance
Screw Fix
12.9mm L
4.76mm S
0.4mm Rad.
Chipbreaker
| Unit System | Designation | IC (Inscribed Circle) | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | CCMT120404MT | 12.7 mm | 0.4 mm |
| Imperial (ANSI) | CCMT431MT | 0.500" | 0.016" |
Recommended Cutting Parameters
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Low Carbon Steel (ISO P) | 250 - 450 m/min | 0.08 - 0.22 mm/rev |
| Alloy Steel (ISO P) | 180 - 320 m/min | 0.08 - 0.18 mm/rev |
Compatible Holders
This CCMT 12-size insert is precision-matched for SCLCR/L 12 external toolholders and S-SCLCR/L 12 boring bars.
Product Applications
- High-speed finishing of automotive drivetrain shafts and components.
- Continuous turning of large-diameter carbon steel rollers and pins.
- Precision boring of alloy steel housings where surface Ra is critical.
- Automated mass production environments requiring long periods of spindle uptime.
TaeguTec Grade Comparison (Steel)
| Grade | Primary Focus | Coating |
|---|---|---|
| TT8115 (CVD) | High Speed / Continuous Finishing | Thick Al2O3 Shield |
| TT8125 (CVD) | General Purpose / Versatility | Toughness Balanced CVD |
Why Choose TaeguTec?
TaeguTec, as part of the IMC Group, is a global powerhouse in metallurgical innovation. The TT8115 grade represents the peak of CVD coating performance, designed for manufacturers who refuse to compromise on surface quality or cycle time. By using TaeguTec inserts, you are utilizing South Korean precision engineering that focuses on maximizing tool life under the most demanding thermal conditions, effectively lowering your cost-per-part in high-volume steel production.
Verified Global Feedback
"Stunning Finish"
We pushed the surface speed to 400m/min on 1045 steel and the TT8115 held up beautifully. The surface finish is mirror-like.
— Manufacturing Corp (USA)"Sehr stabil"
Outstanding resistance to heat. We reduced our cycle times by 20% just by switching to this grade.
— Präzisionstechnik GmbH (Germany)"Ottimo rapporto qualità"
Excellent for finishing alloy steels. The wear is very predictable which is perfect for CNC automation.
— Meccanica Italiana (Italy)Frequently Asked Questions
1. Is TT8115 suitable for interrupted cuts?
TT8115 is highly wear-resistant but can be brittle. For interrupted cuts, we recommend the TT8125 or a PVD-coated grade for better toughness.
2. What is the benefit of the MT chipbreaker?
The MT breaker is a medium-duty geometry that balances sharp cutting action with edge security, ideal for general and finish turning in steel.
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.