TaeguTec CNMG120404MT TT8125 | PVD Carbide Turning Insert
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TaeguTec CNMG120404MT TT8125
Mastering Stainless Steel: High-Toughness PVD Grade for Demanding Turning Operations
Product Overview
"Which insert grade provides the best edge toughness for turning stainless steel when the cut involves light interruptions or unstable cooling?"
The TaeguTec CNMG120404MT TT8125 is an 80° rhombic turning insert purpose-built for ISO M (Stainless Steel) and high-temp alloy machining. The TT8125 PVD grade is renowned for its exceptional coating adhesion and resistance to thermal cracking—a common failure point in stainless steel turning. Utilizing the MT (Medium-Tough) chipbreaker, this insert balances a sharp cutting edge with high fracture toughness, ensuring stable chip evacuation even in gummy materials that tend to cause built-up edge (BUE).
Key Features
Superior thermal shock resistance prevents edge chipping during wet-dry cycles in stainless steel turning.
Reinforced geometry optimized for medium machining, providing smooth chip breaking and lower cutting temperatures.
Sharp-edge PVD coating reduces work-hardening on the workpiece, maintaining tight dimensional tolerances.
Technical Specifications
ISO Code Decoding: CNMG120404MT
80° Rhom
0° Relief
Tolerance
Fixing
12.7mm L
4.76mm S
0.4mm RE
Medium
| Unit System | Designation | I.C. Dimension | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | CNMG120404MT | 12.7 mm | 0.4 mm |
| Imperial (ANSI) | CNMG431MT | 0.500" | 0.016" |
Recommended Cutting Parameters (ISO M)
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Stainless Steel (304/316) | 120 - 200 m/min | 0.10 - 0.28 mm/rev |
| Alloy Steel (P) | 150 - 280 m/min | 0.12 - 0.35 mm/rev |
Recommended Toolholders
Standard ISO fit for DCLNR/L 12, PCLNR/L 12, and MCLNR/L 12 external and boring toolholders.
Product Applications
- Medium precision turning of Stainless Steel 304, 316, and Duplex grades.
- Machining of valve bodies, shafts, and flanges in high-purity industries.
- Excellent for light interrupted cuts where standard CVD grades may flake.
- CNC mass production cycles for aerospace and automotive stainless components.
TaeguTec PVD Grade Comparison
| Grade Name | Grade Profile | Best Use |
|---|---|---|
| TT8125 (PVD) | High Toughness PVD | Toughness Focus: Interrupted/Stainless cuts. |
| TT8115 (PVD) | Heat Resistant PVD | Heat Focus: High-speed finishing on HRSA. |
Why Choose TaeguTec?
As a global leader within the IMC Group, TaeguTec represents the absolute frontier of cutting tool technology. The TT8125 grade is the result of years of metallurgical research into the thermal behavior of stainless steel. By choosing TaeguTec, you invest in industrial-grade consistency that reduces machine downtime, prevents scrap parts, and ensures the lowest cost-per-part in professional CNC manufacturing environments.
Verified Global Feedback
"Perfect for 316 Stainless"
We machine 316L valve stems. Other grades were flaking due to thermal shock. The TT8125 is extremely stable and the finish is top-tier.
— Precision Valve Mfg (USA)"Reliable on Old Lathes"
Using these on a manual machine for repair work. The MT chipbreaker works great even when the setup isn't perfectly rigid.
— Schmidt Industrial (Germany)"Solid Stainless Grade"
Very consistent performance across long batches. The 0.4mm radius is perfect for fine finishing on our CNC lathes.
— Aero-Tech Components (Japan)Frequently Asked Questions
1. Is TT8125 suitable for high-speed steel roughing?
TT8125 is optimized for toughness in Stainless Steel. For high-speed dry roughing of carbon steel, our CVD grade TT9225 is the standard choice.
2. Can I use this for Titanium?
Yes, the PVD coating and MT geometry handle Titanium well, but for maximum life in HRSA, we suggest our TT8115 grade.
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.