TaeguTec CCMT120404MT TT8125 | CVD Turning Insert for Steel Machining
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TaeguTec CCMT120404MT TT8125
The Versatile Workhorse: High-Performance CVD Turning in ISO P Steel
Product Overview
"Which insert grade offers the best balance of heat resistance and edge toughness for general turning in carbon and alloy steels?"
The TaeguTec CCMT120404MT TT8125 is an 80° rhombic insert designed for high-efficiency ISO P (Steel) operations. Featuring the advanced TT8125 CVD coating, it utilizes a thick Al2O3 layer that acts as a thermal shield, allowing for significantly higher cutting speeds without cratering. The MT chipbreaker (Medium Turning) is engineered for steel-specific chip evacuation, featuring a reinforced land that ensures stable performance even in slightly interrupted cuts or surface scale.
Key Features
Thick thermal barrier provides exceptional wear resistance at high speeds (Vc).
Positive rake design reduces cutting pressure and prevents bird-nesting of chips.
A sub-micron substrate engineered to resist chipping during mechanical shock.
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) |
|---|---|---|
| Carbon Steel (ISO P) | 180 - 360 m/min | 0.10 - 0.25 mm/rev |
| Alloy Steel (ISO P) | 150 - 280 m/min | 0.10 - 0.20 mm/rev |
Compatible Toolholders
This insert is precision-matched for standard SCLCR/L 12 external holders and S-SCLCR/L 12 boring bars.
Product Applications
- High-speed turning of automotive drivetrain shafts and gear blanks.
- Precision boring of structural steel housings and pipe fittings.
- Medium machining of 4140, 4340, and 1045 steel grades.
- General job-shop machining where material consistency varies between batches.
TaeguTec Grade Benchmarking (Steel)
| Grade | Type | Performance Strategy |
|---|---|---|
| TT8125 (CVD) | General Purpose | Versatility: Optimized for wide steel range and stability. |
| TT8115 (CVD) | High Speed | Productivity: Best for continuous finishing at high speeds. |
Why Choose TaeguTec?
TaeguTec, as part of the IMC Group, leads the cutting tool industry in metallurgical innovation. The TT8125 grade represents a breakthrough in CVD coating technology, allowing machinists to push their CNC centers to higher RPMs without sacrificing tool integrity. When you choose TaeguTec, you invest in South Korean engineering that prioritizes predictable tool life and high surface integrity, ultimately lowering your cost-per-part in high-volume steel production.
Verified Global Feedback
"Reliable daily driver"
We use TT8125 for 90% of our alloy steel parts. Predictable wear patterns mean no surprises during late-night shifts.
— Precision Lathe (USA)"Top Performance"
Outstanding chip control in 4140. The MT breaker manages chips well even at light depths of cut.
— Werkzeugbau GmbH (Germany)"Ottima per Acciaio"
Excellent heat resistance. We increased surface speed by 15% and tool life remained stable.
— Meccanica di Precisione (Italy)Frequently Asked Questions
1. Is TT8125 suitable for Stainless Steel?
While it can cut steel/inox alloys, it is optimized for ISO P (Steel). For true stainless (ISO M), we recommend TT8020 or TT7015.
2. What is the benefit of CVD over PVD?
CVD coatings are thicker and provide superior thermal protection, making them the first choice for high-speed continuous turning in steel.
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.