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.
Need Help With taegutec Inserts?
Looking for a taegutec equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This taegutec insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.