TaeguTec DNMG150404FG TT8115 | High-Speed Steel Finishing Insert
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TaeguTec DNMG150404FG TT8115
Elite High-Speed CVD Coating: Engineered for Perfect Steel Finishing
Product Overview
"Which insert grade offers the best heat resistance and surface quality for high-velocity finishing on carbon steel parts?"
The TaeguTec DNMG150404FG TT8115 is a high-performance CVD-coated carbide insert optimized for high-speed ISO P (Steel) and ISO K (Cast Iron) turning. The TT8115 grade features a sub-micron hard substrate paired with a thick, multi-layered alumina coating. This provides an incredible thermal barrier, allowing for significantly higher cutting speeds (Vc) without sacrificing tool life. The FG (Finishing Geometry) chipbreaker is designed with a high-positive rake angle that reduces cutting resistance, ensuring elite chip evacuation and a superior surface Ra finish even at very light feeds. The 0.4mm corner radius delivers the precision required for tight tolerances in complex CNC turning operations.
Key Features
Thick Al2O3 coating offers superior oxidation resistance, making it the top choice for dry or high-speed wet machining.
Specially engineered for light finishing passes, preventing built-up edge and ensuring a smooth, polished surface finish.
Enables faster cycle times by allowing higher cutting speeds than general-purpose PVD or lower-tier CVD grades.
Technical Specifications
ISO Code Decoding: DNMG150404FG
55° Rhom
0° Relief
Tolerance
Hole/Sint
12.7mm IC
4.76mm S
0.4mm RE
Chipbreaker
| Unit System | Designation | I.C. Dimension | Radius |
|---|---|---|---|
| Metric (ISO) | DNMG150404FG | 12.7 mm | 0.4 mm |
| Imperial (ANSI) | DNMG431FG | 0.500" | 0.016" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (ISO P) | 180 - 450 m/min | 0.05 - 0.20 mm/rev |
| Cast Iron (ISO K) | 150 - 350 m/min | 0.08 - 0.20 mm/rev |
Compatible Toolholders
This DNMG 1504 series insert is a perfect match for standard Holders and Boring Bars including DDJNR/L 15 and PDJNR/L 15.
Product Applications
- High-precision finishing of automotive steel shafts and components.
- Precision CNC turning for aerospace-grade steel alloys.
- Finishing of gray cast iron housings requiring thermal stability.
- High-output industrial production requiring tight tolerances and mirror surface quality.
TaeguTec Grade Comparison Matrix
| Grade Name | Coating | Primary Focus |
|---|---|---|
| TT8115 | CVD Al2O3 | High Speed: Best for high-velocity steel/iron finishing. |
| TT8125 | CVD TiCN | General Purpose: Balanced for steel turning and light roughing. |
Why Choose TaeguTec?
TaeguTec, as part of the IMC Group, stands at the pinnacle of metalworking technology. The TT8115 grade represents the latest in high-speed CVD coating engineering, designed specifically to reduce thermal shock and prevent cratering in demanding finishing operations. By choosing the DNMG 1504 series with the FG chipbreaker, you are investing in a tool that guarantees consistent surface quality and dimensional accuracy, reducing tool changes and maximizing machine uptime. For elite performance in carbon and alloy steels, TaeguTec is the industry’s trusted partner.
Global Industry Feedback
"Incredible Heat Resistance"
We increased our cutting speed by 30% on steel shafts. The TT8115 holds the edge perfectly and the finish is mirror-like.
— Precision Machining Group (USA)"Top Finish Ra"
Very stable performance on cast iron. The FG breaker works wonders for fine finishing. Highly recommended.
— Werkzeugbau AG (Germany)"Consistency is Key"
Predictable tool life is what we need. This insert delivers exactly that in high-volume production cycles.
— Meccanica S.r.l (Italy)Frequently Asked Questions
1. Is the TT8115 grade suitable for dry turning?
Yes, the thick CVD Al2O3 coating acts as an excellent thermal insulator, making it highly effective for dry, high-speed machining.
2. When should I choose the FG chipbreaker over others?
The FG (Finishing Geometry) should be used for final finishing passes where the depth of cut is small and the highest surface quality is required.
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.