TaeguTec CNMG120408EM TT9215 | High-Speed Stainless Turning Insert
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TaeguTec CNMG120408EM TT9215
High-Velocity Stainless Specialist: Advanced CVD Grade for Maximum Productivity
Product Overview
"Which insert grade provides the longest tool life when high-speed turning 304 or 316 stainless steel components?"
The TaeguTec CNMG120408EM TT9215 is specifically engineered for high-performance turning in ISO M (Stainless Steel). Unlike standard grades, the TT9215 CVD grade features a high-aluminum content coating that provides superior heat resistance and crater wear protection at high cutting speeds. The EM (Medium-Duty) chipbreaker is designed for stable chip evacuation across medium depths of cut, making it the ideal choice for workshops looking to maximize CNC cycle efficiency without compromising surface integrity.
Key Features
A specialized CVD coating that excels in high-heat environments, effectively preventing plastic deformation and crater wear.
Optimized for medium-duty turning, the EM breaker geometry ensures short, manageable chips in gummy stainless materials.
Post-coating treatment reduces friction, allowing for higher cutting speeds (Vc) and better finish quality.
Technical Specifications
ISO Code Decoding: CNMG120408EM
80° Rhom
0° Relief
Tolerance
Hole/Sint
12.7mm IC
4.76mm S
0.8mm RE
Med-Duty
| Unit System | Designation | I.C. Dimension | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | CNMG120408EM | 12.7 mm | 0.8 mm |
| Imperial (ANSI) | CNMG432EM | 0.500" | 0.031" |
Recommended Cutting Parameters (ISO M)
| Stainless Material | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Austenitic (304, 316) | 160 - 280 m/min | 0.15 - 0.40 mm/rev |
| Duplex / PH Stainless | 80 - 150 m/min | 0.15 - 0.35 mm/rev |
Compatible Toolholders
This insert fits all industry-standard 12.7mm I.C. holders including DCLNR/L 12, PCLNR/L 12, and MCLNR/L 12 external tools and boring bars.
Product Applications
- High-efficiency turning of stainless steel valve components and pump shafts.
- CNC machining of automotive fuel systems and exhaust manifolds.
- Continuous turning of large-batch medical or food processing equipment parts.
- Machining of corrosion-resistant fasteners in automated production environments.
TaeguTec Grade Comparison (Stainless)
| Grade Name | Coating Type | Best Use Case |
|---|---|---|
| TT9215 (CVD) | High-Al CVD | High Speed: Continuous cuts & heat resistance. |
| TT9080 (PVD) | Thin PVD | Versatile: General precision & lower speeds. |
Why Choose TaeguTec?
A flagship brand within the IMC Group, TaeguTec is a global pioneer in tungsten carbide innovation. The TT9215 grade represents the next generation of CVD coating technology, specifically designed to eliminate Built-Up Edge (BUE) and cratering in high-productivity stainless steel turning. By choosing TaeguTec, you are investing in industrial-grade consistency that shortens cycle times and delivers a lower cost-per-part on your most competitive projects.
Verified Global Feedback
"Productivity Game Changer"
We increased our Vc by 20% on 304 stainless using the TT9215. Tool life remained stable and the EM breaker kept chips short.
— Precision Machining (USA)"Top Class on Stainless"
Finally, a grade that handles the heat of high-speed turning without premature wear. Very impressive CVD coating.
— Fertigungstechnik GmbH (Germany)"Reliable Performance"
Very consistent geometry. Mirror finish on the workpiece and no issues with the 0.8 radius chipping during medium passes.
— Advanced CNC Works (Italy)Frequently Asked Questions
1. Is the EM chipbreaker good for finishing?
The EM (Medium-Duty) breaker is designed for medium turning. For very light finishing passes where depth of cut is low, we recommend the EA geometry.
2. How does the TT9215 handle interrupted cuts?
TT9215 is a high-speed grade with high hardness. For heavy interruptions or unstable setups in stainless, the TT9225 grade may provide more edge toughness.
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.