TaeguTec DNMG150404MT TT8115 | High-Speed Steel Turning Insert
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TaeguTec DNMG150404MT TT8115
Elite Thermal Stability for High-Speed Precision Steel Finishing
Product Overview
"Which insert grade offers the best surface finish and wear resistance for high-velocity continuous turning of alloy steel?"
The TaeguTec DNMG150404MT TT8115 is a professional-grade CVD-coated carbide insert optimized for high-speed ISO P (Steel) and ISO K (Cast Iron) turning. The TT8115 grade features a specialized sub-micron substrate paired with a thick alumina thermal barrier, allowing it to withstand extreme temperatures during continuous machining. The MT (Medium Turning) chipbreaker utilizes a sharp, positive rake angle to facilitate smooth chip evacuation while maintaining edge strength. With its 0.4mm corner radius, this DNMG 1504 variant offers superior precision and reduced cutting forces, making it ideal for high-tolerance finishing operations.
Key Features
A thick Al2O3 coating provides maximum crater wear resistance during continuous high-speed machining.
Designed for precision finishing and medium turning, ensuring stable chip control and elite surface Ra.
Reduces cutting pressure and heat generation, enabling tight dimensional control on delicate workpieces.
Technical Specifications
ISO Code Decoding: DNMG150404MT
55° Rhom
0° Relief
Tolerance
Hole/Sint
12.7mm IC
4.76mm S
0.4mm RE
Medium
| Unit System | Designation | Thickness (S) | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | DNMG150404MT | 4.76 mm | 0.4 mm |
| Imperial (ANSI) | DNMG431MT | 0.187" | 0.016" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (ISO P) | 180 - 450 m/min | 0.05 - 0.25 mm/rev |
| Alloy Steel (ISO P) | 150 - 380 m/min | 0.05 - 0.20 mm/rev |
Compatible Toolholders
This DNMG 1504 series insert is designed for high-precision holders including DDJNR/L 15 and PDJNR/L 15.
Product Applications
- High-speed finishing of automotive shafts and precision components.
- Precision CNC turning of carbon and alloy steel parts.
- Machining of gray cast iron housings requiring elite surface integrity.
- Final pass operations aiming to eliminate secondary grinding processes.
TaeguTec Grade Benchmarking
| Grade Name | Type | Primary Focus |
|---|---|---|
| TT8115 | CVD Al2O3 | High Speed: Elite finishing in Steel/Iron. |
| TT8125 | CVD TiCN | Balanced: Versatile toughness for general turning. |
Why Choose TaeguTec?
TaeguTec is a world-class innovator in cutting tool technology. The TT8115 grade is specifically engineered to address the thermal demands of high-velocity CNC turning. By utilizing a thick alumina coating and a sub-micron substrate, the DNMG 150404MT ensures maximum resistance to heat deformation. This provides the predictability and precision required for high-volume automated production lines where surface quality and dimensional consistency are non-negotiable.
Verified User Reviews
"Outstanding Ra Quality"
Ran these at 400 m/min on alloy steel. The surface finish is mirror-like, and the tool life is exceptionally consistent.
— CNC Dynamics (USA)"Perfekte Oberflächen"
The MT chipbreaker is excellent for finishing. We've seen a significant reduction in secondary grinding needs.
— Maschinenbau Scholz (Germany)"Reliable Performance"
Very stable grade for high-speed continuous cuts. Handles the heat far better than our previous brand.
— Precision S.r.l (Italy)Frequently Asked Questions
1. Is TT8115 better for wet or dry machining?
The TT8115 grade is designed to handle extreme heat. While it performs brilliantly in dry machining, continuous high-pressure coolant is recommended for maximum tool life in steel.
2. Why choose a 0.4mm radius over a 0.8mm radius?
The 0.4mm radius reduces cutting forces and is ideal for finishing passes where thin-walled parts or high dimensional accuracy are 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.