TaeguTec CCMT120404MT TT8020 | PVD Carbide Turning Insert for Stainless
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TaeguTec CCMT120404MT TT8020
Advanced PVD Toughness Grade for Unstable & Interrupted Stainless Steel Turning
Product Overview
"Which insert grade is the most reliable for interrupted cuts in 304/316 stainless steel or when machining under low-rigidity conditions where tool life is inconsistent?"
The TaeguTec CCMT120404MT TT8020 is an 80° rhombic turning insert specifically engineered to solve the most difficult ISO M (Stainless Steel) and ISO S (HRSA) challenges. Utilizing TaeguTec's specialized TT8020 PVD coating, this grade features a high-toughness substrate that absorbs mechanical impact better than any finishing grade. The MT chipbreaker (Medium Turning) is designed with a reinforced edge geometry that prevents chipping during shock loads while maintaining a sharp enough action to stop work-hardening in gummy materials. This is the ultimate "security" insert for unpredictable machining environments.
Key Features
A multi-layered PVD coating optimized for high adhesion and crack resistance during mechanical impact.
Superior chip breaking in stringy materials, reducing heat buildup and protecting the cutting edge.
Reinforced cutting land provides stability in interrupted cuts, preventing premature tool failure.
Technical Specifications
ISO Code Decoding: CCMT120404MT
80° Rhom.
7° Relief
Tolerance
Fixing
12.9mm L
4.76mm S
0.4mm Rad.
Chipbreaker
| Unit System | Designation | IC (Inscribed Circle) | Thickness (S) |
|---|---|---|---|
| Metric (ISO) | CCMT120404MT | 12.7 mm | 4.76 mm |
| Imperial (ANSI) | CCMT431MT | 0.500" | 0.187" |
Recommended Cutting Parameters
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Stainless Steel (M) | 60 - 150 m/min | 0.10 - 0.22 mm/rev |
| Heat Resistant Alloys (S) | 25 - 65 m/min | 0.08 - 0.15 mm/rev |
Compatible Holders
This insert is precision-engineered for standard SCLCR/L 12 external toolholders and S-SCLCR/L 12 boring bars.
Product Applications
- Heavy interrupted turning of stainless steel pump components and valve stems.
- Lathe operations in job shops with non-rigid, vibrating setups.
- Precision turning of Inconel or Titanium aerospace fittings with interrupted passes.
- Medium-duty finishing of medical-grade stainless steel housings.
TaeguTec Grade Comparison (ISO M)
| Grade | Coating Strategy | Strength |
|---|---|---|
| TT8020 (PVD) | Multi-Layer Toughness | Security: Best for interruptions and instability. |
| TT7015 (PVD) | TiAlN High-Speed | Productivity: Best for high-speed continuous finishing. |
Why Choose TaeguTec?
TaeguTec, as a premium global brand under the IMC Group, is renowned for solving the most aggressive cutting tool problems. The TT8020 grade is specifically engineered to handle the work-hardening tendencies of stainless steel. While standard inserts experience premature chipping under thermal and mechanical stress, TaeguTec’s PVD technology maintains a clean cutting edge through unpredictable conditions. When you choose TaeguTec, you invest in South Korean metallurgical excellence that translates to lower scrap rates and higher reliability on your shop floor.
Verified Global Feedback
"No more chipping"
We had massive chipping issues on 316 stainless with keyways. TT8020 survived where others failed. Incredible toughness.
— Precision Eng (USA)"Exzellente Zähigkeit"
Excellent performance in interrupted cuts. The tool life is very predictable, even on old lathes with vibration.
— Metalltechnik GmbH (Germany)"Ottima per Inox"
Great chip control and very stable. We use this for all our tricky stainless jobs. A must-have grade.
— Meccanica Precisa (Italy)Frequently Asked Questions
1. Should I use TT8020 for high-speed continuous finishing?
For continuous high-speed finishing in stable setups, TT7015 is better. Use TT8020 specifically when you face interruptions or instability.
2. Does this insert require high-pressure coolant?
While not strictly required, high-pressure coolant significantly helps in managing heat in ISO M/S materials, further extending tool life.
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.