TaeguTec SCMT120408-MT TT8115 | Square Steel Turning Insert
Price shown is a starting point. Contact us for a precise quote based on your requirements.
TaeguTec SCMT120408-MT TT8115
High-Velocity Steel Turning Specialist: Optimized for ISO P Performance
Product Overview
"Which square positive insert provides the best tool life and chip breaking when machining alloy steel at high speeds?"
The TaeguTec SCMT120408-MT TT8115 is a high-speed powerhouse designed for ISO P (Steel) turning. The TT8115 grade utilizes a thick CVD coating that acts as a superior thermal barrier, protecting the carbide substrate during intense high-temperature cutting cycles. Paired with the MT (Medium) chipbreaker, this insert features a specialized rake angle that ensures smooth chip evacuation in both carbon and alloy steels, preventing "bird-nesting" and protecting the workpiece surface. The robust 0.8mm radius makes it the perfect choice for medium machining where both durability and finish are paramount.
Key Features
Thick-layer technology provides exceptional crater wear resistance and thermal stability for high-velocity cutting.
Engineered for medium applications, delivering stable chip breaking across a wide range of feed rates.
Offers enhanced edge strength, allowing for higher feed rates while maintaining an excellent surface Ra value.
Technical Specifications
ISO Code Decoding: SCMT120408-MT
Square 90°
7° Relief
Tolerance
Hole/Sint
12.7mm IC
4.76mm S
0.8mm RE
Med Chip
| Unit System | Designation | I.C. (Inscribed Circle) | Thickness (S) |
|---|---|---|---|
| Metric (ISO) | SCMT120408-MT | 12.7 mm | 4.76 mm |
| Imperial (ANSI) | SCMT432-MT | 0.500" | 0.187" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (P) | 280 - 450 m/min | 0.12 - 0.45 mm/rev |
| Alloy Steel (P) | 220 - 400 m/min | 0.10 - 0.40 mm/rev |
Compatible Toolholders
This SCMT 12 series insert is designed for 90° square positive holders. Compatible with: SSKCR/L 12, SCKCR/L 12, or S-SCKCR 12 series boring bars for internal turning.
Product Applications
- High-speed turning and profiling of carbon steel automotive components.
- Precision machining of alloy steel flanges, gear blanks, and shafts.
- Continuous CNC turning in stable setups requiring high dimensional accuracy.
- Internal boring of steel cylinders where chip evacuation is critical.
TaeguTec Grade Benchmarking
| Grade Name | Coating | Best Use Case |
|---|---|---|
| TT8115 | CVD (Thick) | The Speed Specialist: High-velocity continuous cutting of steel. |
| TT8125 | CVD | The All-Rounder: Balanced toughness for general steel turning. |
Why Choose TaeguTec?
TaeguTec is a global leader in tungsten carbide technology, and the SCMT 120408-MT TT8115 represents the absolute pinnacle of high-productivity steel machining. We understand that in modern CNC environments, every second counts. By combining an advanced thick-film CVD coating with a high-strength substrate, TaeguTec enables shops to push cutting speeds to the limit without sacrificing tool life or safety. The MT chipbreaker is the result of rigorous engineering, designed to keep your machines running by managing chip flow flawlessly. When precision, speed, and reliability are required, TaeguTec is the industry’s trusted partner.
Verified Global Feedback
"Productivity Booster"
We pushed our cutting speed to 400 m/min on alloy steel. The TT8115 grade handles the heat like a pro. Consistent parts every time.
— Precision Components LLC (USA)"Hervorragende Leistung"
Perfect chip control with the MT geometry. No more tangled chips on our automated lathes. The 0.8 radius is very robust.
— Weber Fertigungstechnik (Germany)"Ottimo Rapporto Qualità/Prezzo"
Using these for our high-speed steel turning lines. The tool life is significantly better than our previous supplier. Great consistency.
— Meccanica Lombarda (Italy)"Stable and Precise"
The dimensional accuracy is perfect. Even at high velocities, the wear is very predictable. A very professional tool for steel.
— Sato Heavy Industries (Japan)Frequently Asked Questions
1. Is TT8115 suitable for interrupted cutting?
TT8115 is optimized for continuous high-speed cutting. For heavy interruptions, we recommend TT8125 or TT8135 for increased edge toughness.
2. Why choose a 0.8mm radius over 0.4mm?
The 0.8mm radius (08) offers greater edge strength and allows for higher feed rates, making it ideal for medium-duty turning on stable workpieces.
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.