TaeguTec DNMG150408-PC TT8115 | High-Speed Steel Turning Insert
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TaeguTec DNMG150408-PC TT8115
High-Velocity Alumina CVD Grade for Elite Steel Finishing Efficiency
Product Overview
"Which carbide insert grade is best for reducing cycle times in high-speed steel finishing while maintaining a consistent Ra finish?"
The TaeguTec DNMG150408-PC TT8115 is a high-productivity solution designed for ISO P (Steel) machining. The TT8115 grade utilizes a specialized thick-layer CVD Alumina (Al2O3) coating that acts as a thermal barrier, allowing for ultra-high cutting speeds without premature crater wear. The PC (Positive Finishing) chipbreaker is engineered for sharp cutting action, effectively lowering power consumption and preventing workpiece smearing. With a robust 0.8mm radius, this insert provides the mechanical strength required for medium finishing while delivering the precision expected from a dedicated finishing tool.
Key Features
Advanced CVD coating provides superior heat resistance for continuous high-velocity finishing passes.
A positive, sharp rake angle minimizes cutting pressure and ensures elite surface integrity.
Offers increased edge strength over 0.4mm versions while maintaining excellent finish quality.
Technical Specifications
ISO Code Decoding: DNMG150408-PC
55° Rhom
0° Relief
Tolerance
Hole/Sint
12.7mm IC
4.76mm S
0.8mm RE
Pos. Finish
| Unit System | Designation | Thickness (S) | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | DNMG150408-PC | 4.76 mm | 0.8 mm |
| Imperial (ANSI) | DNMG432-PC | 0.187" | 0.031" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (ISO P) | 200 - 450 m/min | 0.15 - 0.35 mm/rev |
| Alloy Steel (ISO P) | 180 - 400 m/min | 0.10 - 0.30 mm/rev |
Compatible Toolholders
This DNMG 1504 series insert fits all standard external and internal toolholders such as DDJNR/L 15 or PDJNR/L 15.
Product Applications
- High-velocity finishing of transmission shafts and large gear components.
- Precision CNC finishing of carbon and low-alloy steel workpieces.
- Applications requiring high surface speeds to achieve mirror-like finishes.
- Mass production environments where cycle time reduction is critical.
TaeguTec Grade Benchmarking
| Grade Name | Type | Primary Focus |
|---|---|---|
| TT8115 | CVD Al2O3 | High Velocity: Maximum throughput in continuous steel cuts. |
| TT8125 | CVD TiCN+Al2O3 | Universal: Superior balance of toughness and wear resistance. |
Why Choose TaeguTec?
TaeguTec is a global innovator in advanced carbide technology, providing high-performance solutions for the most demanding CNC environments. The DNMG 150408-PC TT8115 is a flagship product designed for shops that prioritize productivity and precision. With world-class coating technology and precision-ground geometries, TaeguTec inserts deliver predictable tool life and elite surface finishes, reducing your cost-per-part and boosting your machine throughput. Trust the industrial-grade performance of TaeguTec for your high-speed steel turning operations.
Verified Global Feedback
"Productivity Booster"
Switched to TT8115 and were able to increase our speed by 20%. The PC chipbreaker is perfect for finishing steel.
— Precision Machining LLC (USA)"Top Oberflächengüte"
Fantastic surface Ra even at high feed rates. The Alumina coating really handles the heat well.
— CNC-Fertigung Wagner (Germany)"Grande Affidabilità"
Reliable and sharp. We get consistent results every time. Best insert for finishing our alloy steel shafts.
— Meccanica di Precisione (Italy)"Sharp and Fast"
PC geometry is very sharp, reducing noise and heat. Excellent tool for high-speed precision lathes.
— Advanced Tooling Corp (Japan)Frequently Asked Questions
1. Is TT8115 suitable for heavy interrupted cuts?
No. TT8115 is a high-speed grade optimized for continuous cuts. For interruptions, we recommend TT8125 or TT8135.
2. What is the benefit of the PC chipbreaker over standard types?
The PC (Positive Finishing) geometry is sharper, which reduces cutting forces and friction, leading to cooler cuts and superior surface Ra.
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.