TaeguTec DCMT11T304MT TT8125 | General Purpose Steel Turning Insert
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TaeguTec DCMT11T304MT TT8125
The Industrial Standard for Versatile Steel Turning: Optimized CVD Gold Grade
Product Overview
"Which insert is the most versatile for general steel turning, providing both edge toughness and high-speed wear resistance?"
The TaeguTec DCMT11T304MT TT8125 is the ultimate "All-Rounder" for ISO P (Steel) applications. The TT8125 grade features TaeguTec's signature CVD "Gold Grade" coating technology, offering superior resistance to flank wear and cratering while maintaining the core toughness required to handle slight interruptions. The MT (Medium Turning) chipbreaker is specifically engineered for stable performance across a wide feed range, preventing chip-related surface damage. With its 0.4mm corner radius, this insert is the professional choice for precision finishing and semi-finishing where dimensional accuracy is paramount.
Key Features
A thick CVD coating optimized for heat resistance, significantly extending tool life in high-temperature steel cutting.
Designed with a positive rake angle that reduces cutting forces while ensuring effective chip fragmentation in medium-duty turning.
The perfect compromise between the high-speed capability of TT8115 and the impact resistance of TT8135.
Technical Specifications
ISO Code Decoding: DCMT11T304MT
55° Rhom
7° Relief
Tolerance
Hole/Sint
9.525mm IC
3.97mm S
0.4mm RE
Med-Turn
| Unit System | Designation | I.C. Dimension | Radius |
|---|---|---|---|
| Metric (ISO) | DCMT11T304MT | 9.525 mm | 0.4 mm |
| Imperial (ANSI) | DCMT3(2.5)1MT | 0.375" | 0.016" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (ISO P) | 150 - 380 m/min | 0.08 - 0.25 mm/rev |
| Alloy Steel (ISO P) | 120 - 300 m/min | 0.08 - 0.22 mm/rev |
Compatible Toolholders
This 11T3 DCMT insert is designed for standard holders such as SDJCR/L 11, SDNCN 11, and S-SDUCR/L 11 boring bars.
Product Applications
- General-purpose turning of carbon and low-alloy steels.
- Precision semi-finishing of industrial valves and fittings.
- Automotive component manufacturing requiring consistent Ra surface values.
- Reliable performance in CNC production with mild interrupted cuts.
TaeguTec Grade Comparison Benchmark
| Grade Name | Coating | Optimized For |
|---|---|---|
| TT8115 | CVD Gold | High-speed continuous turning. |
| TT8125 | CVD Gold | General Purpose: Best for varied steel shop tasks. |
Why Choose TaeguTec?
TaeguTec, as a premium global brand under the IMC Group, leads the industry in material science innovation. The TT8125 series is the result of years of research into multi-layered coating structures, providing CNC shops with a reliable "workhorse" insert that performs across diverse steel grades. By choosing the DCMT 11T3 series with the MT chipbreaker, you are investing in reduced downtime, superior surface quality, and the industrial-grade performance that TaeguTec is famous for worldwide.
Global Industry Feedback
"The Perfect All-Rounder"
We use TT8125 for 90% of our steel turning. Reliable in both low and high speeds. Very predictable tool life.
— Precision Works Inc. (USA)"Hervorragende Leistung"
The MT chipbreaker handles gummy steels and harder alloys with ease. Surface finish is top-notch.
— Scholz Maschinenbau (Germany)"Very Consistent"
A solid choice for job shops. Good thermal resistance during long finishing passes.
— Meccanica S.r.l (Italy)Frequently Asked Questions
1. Is the TT8125 suitable for Stainless Steel?
While it can handle some stainless, it is primarily optimized for Steel and Cast Iron. For optimal Stainless Steel results, use the TT9080 PVD grade.
2. How does the MT breaker compare to FG?
FG (Fine Geometry) is for light finishing. MT (Medium Turning) has a more reinforced edge, making it better for general semi-finishing applications.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.