TaeguTec CCMT120404MT TT8020 | PVD Carbide Turning Insert for Stainless
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TaeguTec CCMT120404MT TT8020
Advanced PVD Toughness Grade for Unstable & Interrupted Stainless Steel Turning
Product Overview
"Which insert grade is the most reliable for interrupted cuts in 304/316 stainless steel or when machining under low-rigidity conditions where tool life is inconsistent?"
The TaeguTec CCMT120404MT TT8020 is an 80° rhombic turning insert specifically engineered to solve the most difficult ISO M (Stainless Steel) and ISO S (HRSA) challenges. Utilizing TaeguTec's specialized TT8020 PVD coating, this grade features a high-toughness substrate that absorbs mechanical impact better than any finishing grade. The MT chipbreaker (Medium Turning) is designed with a reinforced edge geometry that prevents chipping during shock loads while maintaining a sharp enough action to stop work-hardening in gummy materials. This is the ultimate "security" insert for unpredictable machining environments.
Key Features
A multi-layered PVD coating optimized for high adhesion and crack resistance during mechanical impact.
Superior chip breaking in stringy materials, reducing heat buildup and protecting the cutting edge.
Reinforced cutting land provides stability in interrupted cuts, preventing premature tool failure.
Technical Specifications
ISO Code Decoding: CCMT120404MT
80° Rhom.
7° Relief
Tolerance
Fixing
12.9mm L
4.76mm S
0.4mm Rad.
Chipbreaker
| Unit System | Designation | IC (Inscribed Circle) | Thickness (S) |
|---|---|---|---|
| Metric (ISO) | CCMT120404MT | 12.7 mm | 4.76 mm |
| Imperial (ANSI) | CCMT431MT | 0.500" | 0.187" |
Recommended Cutting Parameters
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Stainless Steel (M) | 60 - 150 m/min | 0.10 - 0.22 mm/rev |
| Heat Resistant Alloys (S) | 25 - 65 m/min | 0.08 - 0.15 mm/rev |
Compatible Holders
This insert is precision-engineered for standard SCLCR/L 12 external toolholders and S-SCLCR/L 12 boring bars.
Product Applications
- Heavy interrupted turning of stainless steel pump components and valve stems.
- Lathe operations in job shops with non-rigid, vibrating setups.
- Precision turning of Inconel or Titanium aerospace fittings with interrupted passes.
- Medium-duty finishing of medical-grade stainless steel housings.
TaeguTec Grade Comparison (ISO M)
| Grade | Coating Strategy | Strength |
|---|---|---|
| TT8020 (PVD) | Multi-Layer Toughness | Security: Best for interruptions and instability. |
| TT7015 (PVD) | TiAlN High-Speed | Productivity: Best for high-speed continuous finishing. |
Why Choose TaeguTec?
TaeguTec, as a premium global brand under the IMC Group, is renowned for solving the most aggressive cutting tool problems. The TT8020 grade is specifically engineered to handle the work-hardening tendencies of stainless steel. While standard inserts experience premature chipping under thermal and mechanical stress, TaeguTec’s PVD technology maintains a clean cutting edge through unpredictable conditions. When you choose TaeguTec, you invest in South Korean metallurgical excellence that translates to lower scrap rates and higher reliability on your shop floor.
Verified Global Feedback
"No more chipping"
We had massive chipping issues on 316 stainless with keyways. TT8020 survived where others failed. Incredible toughness.
— Precision Eng (USA)"Exzellente Zähigkeit"
Excellent performance in interrupted cuts. The tool life is very predictable, even on old lathes with vibration.
— Metalltechnik GmbH (Germany)"Ottima per Inox"
Great chip control and very stable. We use this for all our tricky stainless jobs. A must-have grade.
— Meccanica Precisa (Italy)Frequently Asked Questions
1. Should I use TT8020 for high-speed continuous finishing?
For continuous high-speed finishing in stable setups, TT7015 is better. Use TT8020 specifically when you face interruptions or instability.
2. Does this insert require high-pressure coolant?
While not strictly required, high-pressure coolant significantly helps in managing heat in ISO M/S materials, further extending tool life.
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.