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.
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.