TaeguTec CNMG120404ML TT8020 | Stainless Steel & Super Alloy Insert
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TaeguTec CNMG120404ML TT8020
Precision for Difficult Materials: High-Toughness PVD Grade for Stainless & Heat-Resistant Alloys
Product Overview
"Which carbide insert grade is best for preventing work-hardening and built-up edge when turning 304/316 stainless steel or Inconel?"
The TaeguTec CNMG120404ML TT8020 is an 80° rhombic turning insert purpose-built for ISO M (Stainless Steel) and ISO S (High-Temperature Alloys). Featuring the specialized TT8020 PVD (Physical Vapor Deposition) coating on a sub-micron tough substrate, this insert excels at lower cutting speeds where edge sharpness is critical to prevent heat-related tool failure. The ML (Medium-Light) chipbreaker is engineered with a very sharp rake and high positive geometry, significantly reducing cutting forces and shearing through gummy materials to deliver a superior surface Ra finish.
Key Features
A thin, smooth PVD TiAlN coating that prevents Built-Up Edge (BUE) and offers exceptional toughness against notch wear.
Optimized for medium-to-light turning. The sharp geometry cuts through work-hardened layers instead of pushing against them.
High-density carbide base provides the shock resistance needed for interrupted cuts in stainless steel pipe and plate.
Technical Specifications
ISO Code Decoding: CNMG120404ML
80° Rhom
0° Relief
Tolerance
Fixing
12.9mm L
4.76mm S
0.4mm RE
Med-Light
| Unit System | Designation | I.C. (Inscribed Circle) | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | CNMG120404ML | 12.7 mm | 0.4 mm |
| Imperial (ANSI) | CNMG431ML | 0.500" | 0.016" |
Recommended Cutting Parameters
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Austenitic Stainless (304/316) | 80 - 180 m/min | 0.08 - 0.25 mm/rev |
| Heat Resistant Alloys (Inconel) | 30 - 60 m/min | 0.10 - 0.20 mm/rev |
Compatible Holders
Standard fit for DCLNR/L 12, PCLNR/L 12, and MCLNR/L 12 series toolholders.
Product Applications
- Precision turning of medical-grade stainless steel components.
- Machining of aerospace heat-resistant super alloys (HRSA).
- Turning stainless steel valves, fittings, and marine hardware.
- General light-to-medium turning where vibration and heat control are mandatory.
TaeguTec Grade Comparison (Stainless Steel)
| Grade Name | Technology | Best Use |
|---|---|---|
| TT8020 (PVD) | Tough Sub-micron | Versatile: Interrupted cuts and lower speeds. |
| TT9080 (PVD) | High Speed PVD | High Velocity: Continuous stainless turning. |
Why Choose TaeguTec?
A global powerhouse under the IMC Group, TaeguTec is the industry leader in difficult-to-cut material solutions. The TT8020 grade with the ML chipbreaker represents the pinnacle of PVD technology, designed to handle the high-heat and work-hardening challenges of modern manufacturing. By choosing TaeguTec, you invest in industrial consistency that reduces scrapped parts, protects your toolholders, and ensures the highest quality finish in every CNC cycle.
Verified Global Feedback
"Perfect for 316 Stainless"
We struggled with built-up edge on our 316 fittings until we switched to TT8020. The edge stays sharp and the surface is mirror-like.
— Marine Precision (USA)"Tough as Nails"
Outstanding performance on interrupted cuts in stainless pipe. The PVD coating doesn't chip like the CVD ones we used before.
— Stahlwerke GmbH (Germany)"Inconel Specialist"
Very stable on super alloys. Predictable wear life which is exactly what we need for our aerospace contracts.
— AeroTech (Italy)Frequently Asked Questions
1. Can I use TT8020 for Steel (ISO P)?
Yes, it is excellent for low-speed steel turning or very tough alloy steels where CVD coatings might chip.
2. Does the ML chipbreaker handle deep cuts?
The ML is optimized for light to medium machining. For heavy roughing, we recommend our specialized MR or RT geometries.
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.