TaeguTec CCMT060204MT TT8020 | PVD Carbide Insert for Stainless Steel
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TaeguTec CCMT060204MT TT8020
The Ultimate Toughness Grade for Interrupted Stainless Steel Machining
Product Overview
"Which insert grade is most reliable for interrupted cuts in stainless steel or when machining under unstable, low-rigidity conditions?"
The TaeguTec CCMT060204MT TT8020 is an 80° rhombic insert engineered for ISO M (Stainless Steel) and ISO S (Super Alloys). Unlike high-speed finishing grades, the TT8020 PVD coating is optimized for maximum edge toughness and adhesion resistance. The MT chipbreaker (Medium Turning) features a reinforced cutting edge that excels at breaking gummy chips while withstanding mechanical shocks. This makes it the go-to solution for machining 304/316 stainless steel when the cut is not continuous or the tool overhang is long.
Key Features
Specialized multi-layer PVD coating designed to prevent chipping and flank wear in difficult conditions.
A robust land design that balances sharpness with the strength needed for interrupted turning passes.
Substrate formulated to stop built-up edge (BUE), ensuring consistent dimensions in gummy stainless alloys.
Technical Specifications
ISO Code Breakdown: CCMT060204MT
80° Rhom.
7° Relief
Tolerance
Hole/Sint.
6.4mm L
2.38mm S
0.4mm Rad.
Chipbreaker
| Unit System | Model Number | IC (Inscribed Circle) | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | CCMT060204MT | 6.35 mm | 0.4 mm |
| Imperial (ANSI) | CCMT21.51MT | 0.250" | 0.016" |
Recommended Cutting Parameters
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Stainless Steel (M) | 60 - 150 m/min | 0.08 - 0.20 mm/rev |
| Super Alloys (S) | 25 - 60 m/min | 0.08 - 0.15 mm/rev |
Compatible Holders
This insert is designed for precision SCLCR/L 06 external holders and S-SCLCR/L 06 boring bars.
Product Applications
- Interrupted turning of stainless steel shafts and valve components.
- Boring operations in stainless steel where vibration is a concern.
- Machining of aerospace fasteners and small fittings in Inconel.
- General job-shop work involving a wide variety of stainless grades.
TaeguTec Grade Comparison (Stainless Steel)
| Grade | Coating | Application Strategy |
|---|---|---|
| TT8020 (PVD) | Multi-layer PVD | Toughness: Interrupted cuts and unstable setups. |
| TT7015 (PVD) | TiAlN PVD | Speed: High-speed finishing in stable conditions. |
Why Choose TaeguTec?
TaeguTec, as part of the IMC Group, leads the industry in solving the most difficult metal-cutting challenges. The TT8020 grade was developed specifically to address the instability of stainless steel machining. While other inserts chip under pressure, the TT8020’s substrate absorbs shock, maintaining a clean edge even during heavy interruptions. By choosing TaeguTec, you are utilizing South Korean precision engineering that focuses on reducing scrap rates and maximizing reliability in your production line.
Verified Global Feedback
"Finally, no more chipping!"
We had massive issues with 316 stainless interrupted cuts. TT8020 fixed it immediately. It’s incredibly tough.
— Precision Machining Co. (USA)"Hervorragend bei Vibrationen"
Stable performance in small internal boring where vibration used to kill our inserts. Very reliable grade.
— Werkzeugbau AG (Germany)"Versatile e Resistente"
Great tool life on stainless steel shafts. The MT chipbreaker works well across different depths of cut.
— Meccanica Italia (Italy)Frequently Asked Questions
1. Should I use TT8020 for continuous high-speed finishing?
For continuous high-speed finishing in stable setups, TT7015 will provide better wear resistance. Use TT8020 when toughness is the priority.
2. Can this grade be used on Carbon Steel?
Yes, it is excellent for tough or interrupted cuts in steel, but for general steel turning, TT8115/TT8125 are more productive.
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.