TaeguTec SCMT09T308-MT TT9225 | Square Stainless Steel Turning Insert
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TaeguTec SCMT09T308-MT TT9225
The Industrial Benchmark for Stainless Steel: High-Toughness CVD Coating Technology
Product Overview
"Which positive square insert is most reliable for turning 304 and 316 stainless steel when faced with varying depths of cut and interrupted surfaces?"
The TaeguTec SCMT09T308-MT TT9225 is a specialized high-performance solution for ISO M (Stainless Steel). The TT9225 grade utilizes a multi-layered CVD coating optimized for thermal stability and resistance to built-up edge (BUE). Unlike standard grades, TT9225 excels in tougher environments where vibration or mechanical shock is present. The MT (Medium) chipbreaker geometry reduces cutting forces and effectively breaks chips even in gummy austenitic steels. With its 0.8mm nose radius, this insert provides a durable edge for medium turning and semi-finishing, ensuring maximum tool life in aggressive CNC production environments.
Key Features
A perfect hybrid of wear resistance and toughness, specifically formulated for the high-heat zones of stainless steel cutting.
Optimized rake and land design ensures consistent chip breaking across a wide range of feed rates and depths of cut.
Smooth coating surface prevents workpiece material from welding to the edge, resulting in superior surface Ra quality.
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) | Thickness (S) |
|---|---|---|---|
| Metric (ISO) | SCMT09T308-MT | 9.52 mm | 3.97 mm |
| Imperial (ANSI) | SCMT32.52-MT | 0.375" | 0.156" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Stainless Steel (M) | 120 - 250 m/min | 0.10 - 0.35 mm/rev |
| Duplex Stainless (M) | 80 - 160 m/min | 0.10 - 0.30 mm/rev |
Compatible Toolholders
This SCMT 09 series insert fits all standard 90° square positive holders. Best paired with: SSKCR/L 09, SCKCR/L 09, or S-SCKCR 09 series boring bars.
Product Applications
- Medium-duty turning and semi-finishing of austenitic stainless steels (304, 316).
- Interrupted cutting in duplex and super-duplex stainless steel components.
- CNC machining of pump shafts, valves, and aerospace fasteners.
- High-efficiency boring where chip evacuation is critical to avoid workpiece damage.
TaeguTec Grade Benchmarking
| Grade Name | Coating Type | Primary Strength |
|---|---|---|
| TT9225 | Advanced CVD | Toughness Specialist: Ideal for interrupted cuts in stainless. |
| TT9215 | CVD Wear-Resistant | Speed: Optimized for high-speed continuous finishing. |
Why Choose TaeguTec?
TaeguTec is a global pioneer in tungsten carbide technology, and the SCMT 09T308-MT TT9225 is a testament to our industrial expertise in stainless steel turning. We understand that ISO M materials are notorious for their work-hardening properties and gummy nature. Our TT9225 grade is engineered with a specialized multi-layer coating that acts as a thermal barrier, protecting the substrate from sudden failure while maintaining a sharp edge. The MT chipbreaker is the result of rigorous field testing, ensuring that your machine runs smoother and your tools last longer. Choose TaeguTec for precision, reliability, and world-class performance.
Verified Global Feedback
"Flawless in 316L"
We were struggling with edge chipping on our duplex parts. Switched to TT9225 and tool life increased by 40%. The toughness is unmatched.
— Precision Marine Components (USA)"Hervorragende Spanabfuhr"
Outstanding chip control with the MT geometry. No more "bird nesting" around the tool holder in our automated cell.
— Müller Zerspanungstechnik (Germany)"Ottima per Inox"
Excellent surface finish even after 2 hours of cutting. The coating stays intact much better than other brands we've tested.
— Meccanica di Precisione (Italy)"Very Versatile"
A very reliable grade for a mix of continuous and light interrupted cuts. Good balance of speed and durability.
— Sato Precision Works (Japan)Frequently Asked Questions
1. Is TT9225 suitable for heavy interrupted cuts?
Yes, TT9225 is specifically designed for toughness. For extremely severe interruptions or very unstable setups, ensure your tool holder is rigid and decrease feed by 10%.
2. Can I use this for finish turning?
The 0.8mm radius and MT chipbreaker are great for semi-finishing. For ultra-fine surface finishes with very low depths of cut, consider a 0.4mm radius (SCMT09T304).
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.