TaeguTec CCMT120408MT TT8125 | CVD Turning Insert for Steel Machining
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TaeguTec CCMT120408MT TT8125
Professional CVD Turning Grade for High-Efficiency Steel Machining
Product Overview
"Which insert grade is the best all-rounder for high-speed medium turning in various carbon steels and alloy steels while maintaining edge security?"
The TaeguTec CCMT120408MT TT8125 is an 80° rhombic turning insert specifically engineered for ISO P (Steel) materials. Utilizing TaeguTec’s advanced TT8125 CVD coating, this insert features a thick Al2O3 thermal barrier that protects the carbide substrate from the high heat generated during high-speed turning. The MT chipbreaker (Medium Turning) is a versatile geometry that balances edge strength with a sharp cutting action, significantly reducing bird-nesting of chips in gummy steels and ensuring stable performance even in light interrupted cuts.
Key Features
Thick coating layer allows for aggressive surface speeds (Vc) without cratering.
Designed to provide consistent chip breaking across a broad range of feed rates (fn).
The 0.8mm radius offers superior edge strength for rougher applications and interrupted passes.
Technical Specifications
ISO Code Decoding: CCMT120408MT
80° Rhom.
7° Relief
Tolerance
Screw Fix
12.9mm L
4.76mm S
0.8mm Rad.
Chipbreaker
| Unit | Model Number | Inscribed Circle (IC) | Thickness (S) |
|---|---|---|---|
| Metric (ISO) | CCMT120408MT | 12.7 mm | 4.76 mm |
| Imperial (ANSI) | CCMT432MT | 0.500" | 0.187" |
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (ISO P) | 180 - 360 m/min | 0.12 - 0.35 mm/rev |
| Alloy Steel (ISO P) | 150 - 300 m/min | 0.10 - 0.28 mm/rev |
Compatible Holders
This CCMT 12 size insert is precision-matched for SCLCR/L 12 external toolholders and S-SCLCR/L 12 boring bars.
Product Applications
- High-speed medium turning of automotive drivetrain shafts and gear blanks.
- Precision boring and turning of 4140, 4340, and 1045 alloy/carbon steels.
- Machining of structural steel components in mass production environments.
- General job-shop operations involving various steel grades and light surface scale.
TaeguTec Grade Comparison (Steel ISO P)
| Grade | Coating | Main Benefit |
|---|---|---|
| TT8125 (CVD) | CVD Al2O3 | Versatility: Best all-rounder for steel. |
| TT8115 (CVD) | CVD Al2O3+TiCN | Speed: Maximum wear resistance at high speeds. |
Why Choose TaeguTec?
TaeguTec, as a member of the IMC Group, leads the industry in solving metal-cutting challenges through high-performance metallurgy. 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 production.
Verified Global Feedback
"Reliable daily driver"
We use TT8125 for 90% of our carbon steel jobs. 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. When should I choose the 0.8mm radius over 0.4mm?
The 0.8mm radius (CCMT120408) provides a stronger cutting edge and higher feed capabilities. Choose this for rougher turning or when a larger fillet radius is required.
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.