TaeguTec SCMT09T308-MT TT8020 | Square Stainless Steel Turning Insert
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TaeguTec SCMT09T308-MT TT8020
Advanced PVD Technology: The Ultimate Solution for Stainless Steel & High-Temp Alloys
Product Overview
"Which square positive insert offers the most reliable edge life and chip evacuation when turning 304 or 316 stainless steel under medium loads?"
The TaeguTec SCMT09T308-MT TT8020 is an industrial specialist designed for ISO M (Stainless Steel) and ISO S (Super Alloys). The TT8020 grade features a specialized PVD coating over a tough sub-micron substrate, making it highly resistant to the work-hardening and built-up edge (BUE) typical of stainless steel. The MT (Medium) chipbreaker is engineered with a positive rake angle that shears through gummy materials effortlessly, providing superior chip control even at high feed rates. This configuration is critical for maintaining dimensional accuracy in aerospace, medical, and high-end automotive parts.
Key Features
PVD coating provides a sharp, resilient edge that resists notch wear in tough-to-cut alloys.
Optimized geometry for medium-duty turning, effectively managing chip flow in ductile and heat-resistant materials.
Enhanced nose radius provides increased edge strength and allows for higher feed rates without sacrificing finish.
Technical Specifications
ISO Code Decoding: SCMT09T308-MT
Square 90°
7° Relief
Tolerance
Hole/Sint
9.52mm IC
3.97mm S
0.8mm RE
Med Chip
| Unit System | Designation | I.C. (Inscribed Circle) | Nose Radius (RE) |
|---|---|---|---|
| Metric (ISO) | SCMT09T308-MT | 9.52 mm | 0.8 mm |
| Imperial (ANSI) | SCMT32.52-MT | 0.375" | 0.031" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Stainless Steel (M) | 80 - 200 m/min | 0.12 - 0.45 mm/rev |
| Super Alloys (S) | 30 - 80 m/min | 0.10 - 0.35 mm/rev |
Compatible Toolholders
This SCMT 09 series insert fits standard 90° square positive holders. Compatible with: SSKCR/L 09 or SCKCR/L 09. For internal boring, use S-SCKCR 09 boring bars.
Product Applications
- Medium-duty turning and profiling of Austenitic (304, 316) and Duplex Stainless Steel.
- Machining of aerospace-grade Super Alloys and Heat-Resistant materials (Inconel, Titanium).
- Internal boring of stainless steel valve bodies and hydraulic components.
- General-purpose turning in CNC job shops handling high-alloy steels.
TaeguTec Grade Benchmarking
| Grade Name | Coating | Best Use Case |
|---|---|---|
| TT8020 | PVD | The Reliable All-Rounder: Best for stable tool life in all stainless steels. |
| TT9080 | PVD | The Tough Fighter: Optimized for heavy interruptions and lower speeds. |
Why Choose TaeguTec?
TaeguTec is a global pioneer in tungsten carbide technology, and the SCMT 09T308-MT TT8020 represents the pinnacle of PVD engineering. We know that stainless steel is notoriously difficult due to its heat retention and work-hardening nature. By utilizing a high-resilience PVD coating paired with the MT chipbreaker, TaeguTec provides an insert that stays sharp longer and breaks chips more effectively than generic carbide. When your workflow involves high-value materials like aerospace alloys or medical-grade stainless, TaeguTec is the industry’s trusted partner for ensuring precision and minimizing scrap.
Verified Global Feedback
"Reliable Tool Life on 316SS"
Outstanding performance on our stainless valve parts. The 0.8 radius is very robust, and we've seen a 25% increase in tool life over our previous supplier.
— Precision Fluid Dynamics (USA)"Perfekt für Edelstahl"
The MT chipbreaker is a lifesaver. No more bird-nesting on the lathe. The finish on Duplex stainless is impeccable.
— CNC Werkstatt Müller (Germany)"Grande Qualità"
Stable edge life even when machining heat-treated stainless. The TT8020 grade is very consistent across all batches.
— Meccanica di Precisione (Italy)"Consistent Boring"
We use these primarily in our boring bars for aerospace alloys. The positive relief angle really helps reduce vibration.
— Sato Aerospace (Japan)Frequently Asked Questions
1. Is TT8020 suitable for interrupted cuts?
TT8020 has good toughness, but for heavy interrupted cuts in stainless steel, we recommend TT9080 for maximum impact resistance.
2. What is the benefit of the 0.8mm nose radius?
The 0.8mm radius (08) offers more edge strength than a 0.4mm radius, making it more suitable for high feed rates and rougher skin on castings.
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.