TaeguTec CNMG120408MC TT8115 | PVD Turning Insert for Super Alloys
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TaeguTec CNMG120408MC TT8115
Engineered for Excellence: High-Performance PVD Grade for Exotic Alloys & Stainless Steel
Product Overview
"Which CNC insert is best for maintaining a sharp cutting edge and resisting extreme heat when turning Inconel 718 or 316L Stainless Steel?"
The TaeguTec CNMG120408MC TT8115 is a premium turning solution designed for ISO S (Super Alloys) and ISO M (Stainless Steel). The TT8115 PVD grade features a specialized ultra-fine substrate and a multi-layered coating that provides exceptional resistance to notch wear and thermal cracking. Coupled with the MC (Medium) chipbreaker, this insert balances edge strength with smooth chip evacuation, making it the ideal choice for high-precision components in aerospace, medical, and energy sectors.
Key Features
Superior oxidation resistance and thermal stability for machining materials that generate extreme heat at the cutting zone.
A stable geometry that reduces cutting forces while providing excellent chip control across a wide range of feed rates.
High-toughness carbide base prevents micro-chipping, ensuring a predictable tool life in demanding HRSA applications.
Technical Specifications
ISO Code Decoding: CNMG120408MC
80° 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) | CNMG120408MC | 12.7 mm | 0.8 mm |
| Imperial (ANSI) | CNMG432MC | 0.500" | 0.031" |
Recommended Cutting Parameters (ISO S/M)
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Inconel / Super Alloys | 30 - 60 m/min | 0.15 - 0.35 mm/rev |
| Stainless Steel (316L) | 120 - 210 m/min | 0.18 - 0.40 mm/rev |
Compatible Toolholders
This 12.7mm I.C. insert fits all standard external and internal toolholders including DCLNR/L 12, PCLNR/L 12, and MCLNR/L 12 series.
Product Applications
- High-temperature alloy turning for aerospace turbine components.
- Precision machining of medical implants and surgical tools.
- Machining of corrosion-resistant stainless steel for marine and chemical valves.
- Medium machining of difficult-to-cut super alloys and duplex stainless steels.
TaeguTec Grade Comparison (HRSA Focus)
| Grade Name | Coating Type | Best Use Case |
|---|---|---|
| TT8115 (PVD) | Multi-Layer PVD | Primary Choice: Super Alloys (ISO S) and sharp edges. |
| TT9225 (CVD) | Thick CVD | Productivity: High-speed continuous Stainless Steel. |
Why Choose TaeguTec?
As a global leader within the IMC Group, TaeguTec represents the absolute peak of metallurgy and coating science. The TT8115 grade is specifically formulated to tackle the "impossible" materials—where heat and friction destroy standard inserts. Choosing the CNMG120408MC means investing in industrial reliability, reduced downtime, and the technical edge required for 21st-century manufacturing.
Verified Global Feedback
"Best for Inconel"
We were struggling with notch wear on our turbine parts. The TT8115 grade solved it. Highly predictable life.
— Aerospace Machining (USA)"Precision on Titanium"
Outstanding surface finish on medical grade Ti. The MC breaker works perfectly with our coolant pressure.
— MedTech Manufacturing (Germany)"Very Stable"
Great consistency between batches. It's our go-to for tough stainless turning jobs.
— Precision Engineering (Japan)Frequently Asked Questions
1. Why choose PVD over CVD for Super Alloys?
PVD coatings are thinner and smoother, allowing for a sharper cutting edge which is essential for reducing the heat generated when cutting gummy materials like Titanium or Inconel.
2. Can this be used for finishing?
The MC (Medium) breaker is designed for general-purpose machining. For ultra-fine finishing, you might consider the EA or PC geometries.