TaeguTec SCMT09T304-MT TT8115 | Square Steel Turning Insert
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TaeguTec SCMT09T304-MT TT8115
Precision Steel Turning: The High-Speed Specialist for Professional CNC Production
Product Overview
"Which positive square insert delivers the highest productivity and surface quality when turning carbon steel at high cutting velocities?"
The TaeguTec SCMT09T304-MT TT8115 is a high-performance solution for ISO P (Steel) applications. The TT8115 grade utilizes a specialized thick CVD coating that serves as a powerful thermal barrier, protecting the carbide substrate from crater wear during intense high-speed cutting. Designed with the MT (Medium) chipbreaker, this insert features a sharp cutting edge and an optimized groove geometry that forces chips to break consistently, preventing workpiece scratching. This combination is essential for shops requiring high-precision finishes and long, predictable tool life in alloy and carbon steels.
Key Features
Optimized for high-speed finishing to medium machining with exceptional heat and wear resistance.
Ensures reliable chip control across various depths of cut, reducing machine downtime from tangled chips.
Perfect for finishing operations requiring tight tolerances and superior surface Ra values.
Technical Specifications
ISO Code Decoding: SCMT09T304-MT
Square 90°
7° Relief
Tolerance
Hole/Sint
9.52mm IC
3.97mm S
0.4mm RE
Medium Chip
| Unit System | Designation | I.C. (Inscribed Circle) | Nose Radius (RE) |
|---|---|---|---|
| Metric (ISO) | SCMT09T304-MT | 9.52 mm | 0.4 mm |
| Imperial (ANSI) | SCMT32.51-MT | 0.375" | 0.015" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (P) | 280 - 450 m/min | 0.10 - 0.35 mm/rev |
| Alloy Steel (P) | 220 - 400 m/min | 0.08 - 0.30 mm/rev |
Compatible Toolholders
The SCMT 09 series is optimized for standard 90° square positive holders. Compatible with: SSKCR/L 09 or SCKCR/L 09. For internal boring, use S-SCKCR 09 boring bars.
Product Applications
- High-speed finishing and medium turning of low-to-medium carbon steels.
- Precision profiling of alloy steel shafts and geared components.
- Continuous machining of steel parts requiring high surface integrity.
- Internal boring of steel cylinders and hydraulic manifolds.
TaeguTec Grade Comparison
| Grade Name | Coating | Primary Strength |
|---|---|---|
| TT8115 | CVD (Thick) | Speed Specialist: Best for high-velocity continuous steel cutting. |
| TT8125 | CVD | The Versatile All-Rounder: Balanced toughness for general steel turning. |
Why Choose TaeguTec?
TaeguTec is a global leader in tungsten carbide technology, and the SCMT 09T304-MT TT8115 represents the ultimate in high-speed steel machining. By utilizing advanced CVD coating techniques, TaeguTec provides an insert that maintains a sharp cutting edge even under extreme thermal loads. The MT chipbreaker ensures that chip management is a non-issue, allowing your CNC machines to run longer with less intervention. When precision and productivity are your top priorities, TaeguTec is the industry’s trusted partner for superior results.
Verified Global Feedback
"Flawless Surface Finish"
Using these for finishing 4140 steel. The 0.4mm radius gives us the exact Ra value we need. Tool life in TT8115 is incredible at high speeds.
— Precision Machining Group (USA)"Hervorragende Standzeit"
Very stable performance in alloy steels. The CVD coating handles the heat perfectly during long continuous cuts. Highly recommend for high-speed CNC lines.
— Schmidt Fertigungstechnik (Germany)"Ottima per Acciaio"
The chipbreaker is very effective. We have zero bird-nesting issues on our lathes now. Great tool life on carbon steel components.
— Meccanica di Precisione (Italy)"Consistent Quality"
Reliable performance across all batches. We use this for boring steel parts and the 7-degree relief angle works very well.
— Tanaka Heavy Industries (Japan)Frequently Asked Questions
1. Can I use TT8115 for interrupted cuts?
TT8115 is optimized for continuous high-speed cutting. For heavy interrupted cuts, we recommend TT8125 or TT8135 for better edge toughness.
2. What materials is this insert best for?
It is specifically designed for ISO P (Steel), including carbon steels, alloy steels, and tool steels in stable machining conditions.
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.