TaeguTec DNMG150404R-VF TT8115 | High-Speed Steel Finishing Insert
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TaeguTec DNMG150404R-VF TT8115
Precision Velocity: The High-Speed Choice for Mirror-Finish Steel Turning
Product Overview
"Which insert grade offers the best tool life and chip control for high-speed finishing passes on carbon and alloy steels?"
The TaeguTec DNMG150404R-VF TT8115 is a professional-grade solution for ISO P (Steel) finishing. The TT8115 grade is characterized by its advanced CVD coating, featuring a thick Alumina (Al2O3) layer that acts as a thermal shield during high-velocity friction. This allows for significantly higher cutting speeds without sacrificing edge integrity. The VF (Very Fine) chipbreaker geometry is optimized for light depths of cut, ensuring that chips are broken and evacuated efficiently even at low feed rates, preventing workpiece scratching and bird-nesting.
Key Features
TT8115's CVD coating provides elite heat resistance, perfect for continuous high-speed finishing passes.
Specifically designed for light cutting depths, ensuring mirror-like surface finishes and tight tolerances.
Low cutting force prevents vibration in slim workpieces while delivering extreme dimensional accuracy.
Technical Specifications
ISO Code Decoding: DNMG150404R-VF
55° Rhom
0° Relief
Tolerance
Hole/Sint
12.7mm IC
4.76mm S
0.4mm RE
Finishing
| Unit System | Designation | Thickness (S) | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | DNMG150404R-VF | 4.76 mm | 0.4 mm |
| Imperial (ANSI) | DNMG431R-VF | 0.187" | 0.016" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Low Carbon Steel | 250 - 500 m/min | 0.05 - 0.20 mm/rev |
| Alloy Steel (ISO P) | 180 - 420 m/min | 0.05 - 0.18 mm/rev |
Compatible Toolholders
This 1504 series DNMG insert fits standard 55° holders. For finishing precision, we recommend high-quality holders: DDJNR/L 15, PDJNR/L 15, or SDJNR/L 15.
Product Applications
- High-speed finishing of automotive components and precision axles.
- Continuous turning operations where heat generation is a concern.
- Machining of carbon steel, alloy steel, and tool steels in finishing passes.
- Ideal for CNC environments requiring mirror surface Ra values and high productivity.
TaeguTec Grade Comparison
| Grade Name | Coating Type | Best Use Case |
|---|---|---|
| TT8115 | CVD (Thick Al2O3) | Velocity Specialist: Elite speed and thermal stability. |
| TT8125 | CVD (Universal) | All-Rounder: Best for varied steel and interruptions. |
Why Choose TaeguTec?
TaeguTec is a global leader in carbide innovation, specialized in delivering tool solutions that push the limits of modern CNC productivity. The DNMG 150404R-VF TT8115 is a testament to Korean engineering excellence, combining a high-toughness substrate with the world's most advanced CVD Alumina coating technology. By choosing TaeguTec, you invest in predictable tool life, reduced machine downtime, and an uncompromising finish quality that reduces secondary polishing costs. Experience the power of high-speed finishing with the VF series.
Verified Global Feedback
"Exceptional Speed"
We increased our Vc to 400 m/min on 1045 steel and these inserts didn't even flinch. The finish is mirror-like.
— Precision Machining Co. (USA)"Hervorragende Qualität"
Stable tool life across our entire shift. The VF chipbreaker works perfectly even at very low feed rates.
— Werkzeugbau AG (Germany)"Finitura Ottimale"
The best insert for finishing small steel parts. Very consistent dimensional control.
— Meccanica di Precisione (Italy)"Very Sharp and Stable"
Great performance in continuous passes. Surface Ra is consistently under 0.8 microns.
— Tanaka Industries (Japan)Frequently Asked Questions
1. Can I use TT8115 for interrupted cuts?
TT8115 is optimized for continuous cutting at high speeds. For interrupted steel turning, TT8125 is the recommended tougher grade.
2. What is the benefit of the 0.4mm radius?
A 0.4mm radius reduces cutting pressure, making it ideal for finishing passes where high precision and fine surface finishes are required without causing vibration.
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.