TaeguTec DCMT11T304FG TT8125 | CVD Coated Steel Turning Insert
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TaeguTec DCMT11T304FG TT8125
Advanced CVD Gold Grade: Maximum Efficiency for Precision Steel Finishing
Product Overview
"Which insert provides the best thermal stability and surface finish during high-speed continuous steel turning?"
The TaeguTec DCMT11T304FG TT8125 is specifically designed for ISO P (Steel) and stable ISO K (Cast Iron) applications. The TT8125 grade features a thick, multi-layered CVD coating (TiCN + Al2O3) that provides a superior thermal barrier, protecting the carbide substrate from crater wear even at high spindle speeds. The FG (Finishing-General) chipbreaker is meticulously ground to a sharp edge, allowing for lower cutting forces and preventing built-up edge (BUE). This combination ensures that the insert maintains a consistent 0.4mm corner radius throughout long production runs, providing the high-gloss finish required for precision industrial components.
Key Features
A specialized Alumina layer provides elite heat resistance, allowing for significantly higher cutting speeds than conventional PVD inserts.
Optimized for light depths of cut, providing excellent chip fragmentation and preventing vibration in thin-walled workpieces.
Specifically engineered to deliver stable dimensions and sub-micron surface Ra values in steel alloys and carbon steel.
Technical Specifications
ISO Code Decoding: DCMT11T304FG
55° Rhom
7° Relief
Tolerance
Hole/Sint
9.525mm IC
3.97mm S
0.4mm RE
Finishing
| Unit System | Designation | I.C. Dimension | Thickness (S) |
|---|---|---|---|
| Metric (ISO) | DCMT11T304FG | 9.525 mm | 3.97 mm |
| Imperial (ANSI) | DCMT3(2.5)1FG | 0.375" | 0.156" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (ISO P) | 180 - 450 m/min | 0.05 - 0.20 mm/rev |
| Alloy Steel (ISO P) | 120 - 350 m/min | 0.05 - 0.15 mm/rev |
Compatible Toolholders
This DCMT 11T3 insert is optimized for all standard precision holders including SDJCR/L 11, SDNCN 11, and S-SDUCR/L 11 boring bars.
Product Applications
- High-speed finishing of automotive drive shafts and carbon steel gears.
- Precision boring operations in alloy steel components requiring tight tolerances.
- Finishing passes for gray cast iron housings where heat management is critical.
- Continuous turning in large-batch CNC production environments.
TaeguTec Steel Grade Benchmark
| Grade Name | Coating Type | Primary Focus |
|---|---|---|
| TT8125 (Carbide) | CVD Gold (Al2O3) | Thermal Resistance: Maximum speed in ISO P steel. |
| TT5080 (Carbide) | PVD TiAlN | Edge Toughness: Gummy materials like Stainless Steel. |
Why Choose TaeguTec?
TaeguTec is a premier brand under the IMC Group, known globally for setting the benchmark in CNC tooling efficiency. The TT8125 series is the result of intensive R&D into CVD coating architecture, designed for the modern CNC shop that cannot afford downtime. By providing a grade that withstands the extreme temperatures of high-speed steel turning while maintaining a sharp cutting edge, TaeguTec ensures your operations are faster, more reliable, and significantly more cost-effective. Trust TaeguTec for the industrial-grade performance your precision machining requires.
Global Industry Feedback
"Flawless Surface Finish"
We increased our Vc by 25% on our steel shaft project. The TT8125 inserts maintained a perfect gloss finish even after 100 parts.
— SteelCraft Precision (USA)"Top für die Serienfertigung"
Very stable dimensions across large batches. The FG chipbreaker produces ideal chips in 42CrMo4.
— Zerspanung Nord (Germany)"Solid Steel Performer"
Thermal resistance is very high. No cratering issues even during aggressive finishing cycles.
— Meccanica S.r.l (Italy)Frequently Asked Questions
1. What makes TT8125 better than PVD grades for steel?
The CVD coating is thicker and provides a much stronger heat barrier (Alumina). This prevents the carbide from softening at the high temperatures generated by high-speed steel turning.
2. Can I use the FG chipbreaker for roughing?
No. The FG geometry is ground for light finishing passes (usually 0.2mm to 1.0mm DOC). For roughing, a heavier geometry like MT would be more suitable.
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.