TaeguTec CCMT09T304MT TT8020 | PVD Turning Insert for Stainless Steel
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TaeguTec CCMT09T304MT TT8020
The Toughness Specialist for Interrupted Stainless Steel & HRSA Machining
Product Overview
"Which insert grade is most reliable for interrupted cuts in 304/316 stainless steel or when machining under unstable, low-rigidity lathe setups?"
The TaeguTec CCMT09T304MT TT8020 is an 80° rhombic turning insert engineered for ISO M (Stainless Steel) and ISO S (Heat Resistant Super Alloys). Featuring the high-performance TT8020 PVD coating, this grade is specifically designed to prevent chipping where other carbides fail. The MT chipbreaker (Medium Turning) provides a reinforced cutting edge that balances sharpness with the strength needed for interrupted passes, ensuring predictable chip control and high surface integrity in gummy materials.
Key Features
A specialized PVD grade that offers superior resistance to mechanical shock and thermal cracking.
Medium-Turning design reduces cutting forces while effectively evacuating long, stringy stainless chips.
Excellent adhesion properties prevent Built-Up Edge (BUE) on gummy stainless steel workpieces.
Technical Specifications
ISO Code Explanation: CCMT09T304MT
80° Rhom.
7° Relief
Tolerance
Hole/Sint.
9.7mm L
3.97mm S
0.4mm Rad.
Chipbreaker
| Unit System | Designation | Inscribed Circle (IC) | Thickness (S) |
|---|---|---|---|
| Metric (ISO) | CCMT09T304MT | 9.525 mm | 3.97 mm |
| Imperial (ANSI) | CCMT32.51MT | 0.375" | 0.156" |
Recommended Cutting Parameters
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Stainless Steel (M) | 70 - 160 m/min | 0.08 - 0.20 mm/rev |
| HRSA Super Alloys (S) | 30 - 65 m/min | 0.08 - 0.15 mm/rev |
Compatible Holders
This insert is designed for SCLCR/L 09 external toolholders and S-SCLCR/L 09 boring bars.
Product Applications
- Medium turning and finishing of stainless steel valve components.
- Interrupted cutting of aerospace fittings in Inconel or Titanium.
- Boring operations in medical-grade stainless steel shafts.
- General job-shop machining where material consistency varies.
TaeguTec Grade Comparison (ISO M)
| Grade | Coating | Performance Strategy |
|---|---|---|
| TT8020 (PVD) | High-Toughness PVD | Toughness: Best for interrupted cuts and vibration. |
| TT7015 (PVD) | TiAlN PVD | Speed: Optimized for high-speed stable finishing. |
Why Choose TaeguTec?
TaeguTec, a member of the IMC Group, is a global leader in high-performance metallurgy. The TT8020 grade is specifically engineered to handle the work-hardening and gummy characteristics of stainless steels. While other carbides suffer from thermal cracking and edge chipping, TaeguTec’s PVD technology maintains edge integrity through heavy mechanical shocks. Choosing TaeguTec means investing in South Korean precision that reduces cycle times and significantly lowers scrap rates in challenging materials.
Verified Global Feedback
"Fixed our chipping issues"
We had massive issues with interrupted cuts on 316 shafts. The TT8020 grade survived where others crumbled. Highly recommended.
— Precision Lathe (USA)"Hervorragend bei Edelstahl"
Very stable performance in small internal boring. The MT chipbreaker ensures the chips don't bird-nest.
— Fertigungstechnik GmbH (Germany)"Ottima durata dell'utensile"
Great life on Titanium parts. Even with light interruptions, the edge stays sharp and dimensions tight.
— Meccanica di Precisione (Italy)Frequently Asked Questions
1. Should I use TT8020 for dry machining?
For best results in stainless steel, high-pressure coolant is recommended to manage heat and prevent Built-Up Edge.
2. Can this grade be used on Carbon Steel?
Yes, but it is optimized for ISO M/S. For general steel turning, the TT8115/TT8125 grades will offer better 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.