TaeguTec DNMG150408MT TT8115 | High-Speed Steel Turning Insert
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TaeguTec DNMG150408MT TT8115
Elite Thermal Stability for High-Speed Steel and Cast Iron Turning
Product Overview
"Which insert grade provides the best balance of wear resistance and speed when turning alloy steel at high velocities?"
The TaeguTec DNMG150408MT TT8115 is a high-stability CVD-coated carbide insert specifically engineered for ISO P (Steel) and ISO K (Cast Iron). The TT8115 grade utilizes a specialized sub-micron substrate paired with a thick alumina thermal barrier, allowing it to withstand extreme temperatures during continuous high-speed machining. The MT (Medium Turning) chipbreaker is optimized for versatility, providing excellent chip control and low cutting forces. With a 0.8mm corner radius, this insert offers superior edge toughness, making it the primary choice for automated CNC production lines aiming for maximum throughput and consistent surface Ra values.
Key Features
Advanced CVD coating provides incredible heat resistance, enabling significantly higher Vc (cutting speeds).
Optimized for medium-duty turning, ensuring stable chip breaking and preventing chip nesting.
A robust radius that provides excellent resistance to edge chipping in high-velocity continuous cuts.
Technical Specifications
ISO Code Decoding: DNMG150408MT
55° Rhom
0° Relief
Tolerance
Hole/Sint
12.7mm IC
4.76mm S
0.8mm RE
Medium
| Unit System | Designation | I.C. Dimension | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | DNMG150408MT | 12.7 mm | 0.8 mm |
| Imperial (ANSI) | DNMG432MT | 0.500" | 0.031" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (ISO P) | 180 - 450 m/min | 0.15 - 0.45 mm/rev |
| Alloy Steel (ISO P) | 150 - 380 m/min | 0.15 - 0.40 mm/rev |
Compatible Toolholders
This DNMG 1504 series insert is compatible with standard Holders including DDJNR/L 15 and PDJNR/L 15.
Product Applications
- High-speed turning of automotive transmission shafts.
- Precision CNC machining of alloy and carbon steel components.
- Mass production of steel parts where cycle time reduction is a priority.
- Turning of gray and ductile cast iron housings and pump bodies.
TaeguTec Grade Benchmarking
| Grade Name | Type | Primary Benefit |
|---|---|---|
| TT8115 | CVD Al2O3 | High Speed: Elite performance in Steel & Iron. |
| TT8125 | CVD TiCN | General Purpose: Best toughness for standard steels. |
Why Choose TaeguTec?
TaeguTec is a global leader in advanced carbide solutions. The TT8115 grade is specifically engineered to overcome the thermal hurdles of high-speed CNC turning. By utilizing a thick alumina coating and a sub-micron substrate, the DNMG 150408MT ensures maximum resistance to heat deformation and chemical wear. This provides the predictability and precision required for high-volume automated production lines where consistent part quality and reduced cycle times are essential for profitability.
Verified Global Feedback
"Excellent at High Vc"
We increased our cutting speed by 25% on 4140 steel. The tool life is still better than our previous supplier.
— Precision Machining Corp (USA)"Perfekte Ergebnisse"
Outstanding chip control on medium carbon steel. The TT8115 grade handles the heat without any cratering issues.
— Drehtechnik Gmbh (Germany)"Stable for Iron and Steel"
Great for multi-material workshops. It cuts steel and ductile iron very smoothly with very little wear.
— Meccanica S.p.A. (Italy)Frequently Asked Questions
1. Can TT8115 handle interrupted cuts?
The TT8115 grade is optimized for continuous high-speed turning. For heavy interrupted cuts, we recommend the TT8125 grade for better shock resistance.
2. What is the benefit of the 0.8mm radius?
The 0.8mm corner radius offers a stronger cutting edge than 0.4mm, allowing for higher feed rates and better durability in roughing or medium turning.
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.