aeguTec DNMG150408FG TT8115 | High-Speed Steel Finishing Insert
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TaeguTec DNMG150408FG TT8115
Mastering High-Velocity Finishing: The Ultimate Steel Machining Grade
Product Overview
"Which insert grade is the absolute best for achieving a mirror-like surface finish on steel at maximum CNC cutting speeds?"
The TaeguTec DNMG150408FG TT8115 is a high-performance CVD-coated carbide insert, specifically optimized for high-velocity ISO P (Steel) and ISO K (Cast Iron) turning. The TT8115 grade features a specialized hard substrate paired with a thick, multi-layered alumina coating that acts as a superior thermal barrier. This allows for significantly higher cutting speeds (Vc) than general-purpose grades while maintaining exceptional edge integrity. The FG (Finishing Geometry) chipbreaker is engineered for elite chip control at light loads, ensuring that every pass results in a superior surface finish and precise dimensional accuracy.
Key Features
Thick Al2O3 layer provides extreme resistance to cratering and thermal shock, perfect for dry or high-speed machining.
High-positive rake design reduces cutting forces, ensuring excellent chip evacuation and mirror-quality finishes.
Provides greater edge strength and stability over 0.4mm variants, ideal for high-volume automated production.
Technical Specifications
ISO Code Decoding: DNMG150408FG
55° Rhom
0° Relief
Tolerance
Hole/Sint
12.7mm IC
4.76mm S
0.8mm RE
Finishing
| Unit System | Designation | I.C. Dimension | Radius |
|---|---|---|---|
| Metric (ISO) | DNMG150408FG | 12.7 mm | 0.8 mm |
| Imperial (ANSI) | DNMG432FG | 0.500" | 0.031" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (ISO P) | 180 - 450 m/min | 0.08 - 0.25 mm/rev |
| Cast Iron (ISO K) | 150 - 380 m/min | 0.10 - 0.25 mm/rev |
Compatible Toolholders
This DNMG 1504 series insert fits all standard external and internal toolholders including DDJNR/L 15 and PDJNR/L 15.
Product Applications
- High-speed finishing for automotive steel components and shafts.
- Precision CNC turning for mechanical gears and precision housings.
- Machining of gray cast iron parts requiring extreme thermal stability.
- Automated mass production where consistent tool life and surface Ra are vital.
TaeguTec Grade Benchmarking
| Grade Name | Coating | Primary Application |
|---|---|---|
| TT8115 | CVD Coated | High-Speed Finishing: Mirror surface in Steel/Iron. |
| TT8125 | CVD Coated | General Turning: Balanced toughness for Steel. |
Why Choose TaeguTec TT8115?
TaeguTec is a world-class leader in cutting tool innovation, and the TT8115 grade represents the pinnacle of high-velocity machining technology. Specifically engineered to withstand the extreme temperatures generated during high-speed CNC turning, the TT8115 grade combines a sub-micron hard substrate with a thick CVD alumina coating. This ensures that the DNMG150408FG maintains its sharp cutting edge longer than standard inserts, reducing downtime and tool changes. When your production demands both high efficiency and a reflective surface finish, TaeguTec is the industrial standard for excellence.
Global Industry Feedback
"Consistent Mirror Finish"
We pushed our cutting speed to 400 m/min on carbon steel shafts. The TT8115 grade is rock solid. The surface finish is better than grinding.
— Precision Machining Group (USA)"Hervorragende Leistung"
Exceptional performance on alloy steel. FG breaker geometry gives perfect chip control even at very low feeds.
— Werkzeugbau AG (Germany)"Ottimo prodotto"
Very stable dimensions over long production runs. The 0.8mm radius is very strong. Great for our high-speed iron turning.
— Meccanica S.r.l (Italy)Frequently Asked Questions
1. Is TT8115 better for wet or dry machining?
The TT8115 grade is optimized for high-heat environments. It excels in high-speed wet machining but is also highly effective for dry turning due to its thick thermal coating.
2. What makes the FG breaker the right choice for finishing?
The FG (Finishing Geometry) chipbreaker has a sharp edge and a high-positive rake that reduces tool pressure, ensuring a smooth finish and preventing surface tearing.
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.