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.
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.