TaeguTec SCMT120404-MT TT8115 | Square Steel Turning Insert
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TaeguTec SCMT120404-MT TT8115
Engineered for ISO P: High-Velocity Square Insert for Advanced Steel Turning
Product Overview
"Which 12mm square insert provides the highest heat resistance and surface finish quality when turning alloy steel at high speeds?"
The TaeguTec SCMT120404-MT TT8115 is a high-speed specialist designed for ISO P (Steel) applications. The TT8115 grade features a thick-film CVD coating that acts as a robust thermal barrier, protecting the carbide substrate from crater wear during high-velocity dry or wet cutting. The MT (Medium) chipbreaker is geometry-tuned for stable chip flow, effectively managing long chips in carbon and alloy steels. This combination ensures maximum productivity and minimal tool changes during continuous CNC turning operations.
Key Features
Advanced coating technology provides extreme hardness and thermal insulation for high-speed continuous cutting.
Ensures smooth evacuation and reduced cutting forces, preventing bird-nesting in steel materials.
Optimized for finishing to medium applications where high surface integrity and tight tolerances are required.
Technical Specifications
ISO Code Decoding: SCMT120404-MT
Square 90°
7° Relief
Tolerance
Hole/Sint
12.7mm IC
4.76mm S
0.4mm RE
Medium Chip
| Unit System | Designation | I.C. (Inscribed Circle) | Thickness (S) |
|---|---|---|---|
| Metric (ISO) | SCMT120404-MT | 12.7 mm | 4.76 mm |
| Imperial (ANSI) | SCMT431-MT | 0.500" | 0.187" |
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
This SCMT 12 series insert is designed for 90° square positive holders. Compatible with: SSKCR/L 12, SCKCR/L 12, or S-SCKCR 12 boring bars for high-stability internal turning.
Product Applications
- High-speed finishing of carbon steel automotive drive shafts.
- Precision turning of alloy steel flanges and geared components.
- Continuous machining of steel hydraulic manifolds and valve bodies.
- General-purpose steel turning requiring high surface integrity.
TaeguTec Steel Specialists
| Grade Name | Coating | Strength |
|---|---|---|
| TT8115 | CVD (Thick Al2O3) | Wear Resistance: Best for high-velocity continuous steel cutting. |
| TT8125 | CVD | Versatility: Balanced toughness for general steel turning applications. |
Why Choose TaeguTec?
TaeguTec is a world leader in CNC cutting tool technology, and the SCMT 120404-MT TT8115 embodies our commitment to industrial excellence. We understand that productivity in steel turning hinges on thermal stability. 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. The MT chipbreaker geometry ensures that chip evacuation remains consistent, reducing downtime and protecting your workpiece finish. When your production requires the perfect blend of precision and speed, TaeguTec is the industry standard.
Verified Global Feedback
"Superb Finish on 4140"
We increased our cutting speed by 15% on alloy shafts. The 0.4mm radius leaves a mirror finish, and the TT8115 grade is incredibly stable under heat.
— Precision Dynamics Corp. (USA)"Top für die Serienfertigung"
Outstanding tool life in high-speed automated lines. The chip breaking is perfect; no more bird-nesting on our CNC lathes.
— Weber Maschinenbau (Germany)"Ottimo per Acciaio Legato"
Reliable and consistent. We use these for finishing gears. The dimensional accuracy is perfect from the first part to the last.
— Meccanica Lombarda (Italy)"High Velocity Stability"
The CVD coating is very durable. We've seen much better resistance to crater wear than previous brands. A professional tool.
— Hoshi Manufacturing (Japan)Frequently Asked Questions
1. Is TT8115 suitable for interrupted cuts?
TT8115 is optimized for continuous high-speed cutting. For heavy interrupted cuts, we recommend TT8125 or TT8135 for better impact resistance.
2. Why use a 0.4mm nose radius (04)?
The 0.4mm radius provides lower cutting forces and a superior surface finish, making it ideal for finishing passes and thin-walled components.
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.