TaeguTec SCMT120404-PC TT8115 | Square CVD Insert for Cast Iron
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TaeguTec SCMT120404-PC TT8115
High-Speed Cast Iron Master: Precision Finishing with Thick CVD Coating
Product Overview
"Which CNC insert is most effective for high-velocity finishing of cast iron components where crater wear and abrasion resistance are the top priorities?"
The TaeguTec SCMT120404-PC TT8115 is a specialized turning solution for ISO K (Cast Iron) and high-speed ISO P (Steel). The TT8115 grade features a thick Al2O3 CVD coating that provides a superior thermal barrier and extreme hardness against abrasive Gray and Ductile irons. The PC (Precision) chipbreaker is engineered with a positive rake angle to reduce cutting forces and prevent vibrations during fine finishing. With a 0.4mm nose radius, this insert excels at maintaining tight dimensional tolerances and delivering a superior surface Ra value in high-volume production cycles.
Key Features
Optimized for wear resistance at high temperatures, allowing for increased cutting speeds (Vc) without compromising edge life.
Specifically designed for finishing passes. The sharp edge slices through the material, reducing the risk of built-up edge (BUE).
The multi-layer CVD coating resists chemical wear and cratering, typical in high-speed cast iron machining.
Technical Specifications
ISO Code Decoding: SCMT120404-PC
Square 90°
7° Relief
Tolerance
Hole/Sint
12.7mm IC
4.76mm S
0.4mm RE
Prec Finish
| Unit System | Designation | I.C. (Inscribed Circle) | Nose Radius (RE) |
|---|---|---|---|
| Metric (ISO) | SCMT120404-PC | 12.70 mm | 0.4 mm |
| Imperial (ANSI) | SCMT431-PC | 0.500" | 0.016" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Cast Iron (ISO K) | 200 - 450 m/min | 0.10 - 0.25 mm/rev |
| Carbon Steel (ISO P) | 180 - 350 m/min | 0.05 - 0.20 mm/rev |
Compatible Toolholders
This SCMT 12 series insert fits standard 90° square positive holders. Compatible with: SSKCR/L 12, SCKCR/L 12, or S-SCKCR 12 internal boring bars.
Product Applications
- High-speed finishing of Gray Iron automotive brake components.
- Precision turning of Ductile Iron gear housings and transmission parts.
- Finishing of medium-carbon steel shafts and fasteners in mass production.
- Internal boring operations where surface Ra is critical for assembly.
TaeguTec Grade Benchmarking (Cast Iron Focus)
| Grade Name | Coating | Machining Condition |
|---|---|---|
| TT8115 | High-Hardness CVD | High-Speed Finishing: Best for continuous cuts and wear resistance. |
| TT8125 | Balanced CVD | General Purpose: Best for mixed cuts and slight interruptions. |
Why Choose TaeguTec?
TaeguTec is a global pioneer in tungsten carbide innovation, and the SCMT120404-PC TT8115 is a benchmark for high-velocity cast iron machining. We understand that cast iron creates abrasive dust and high heat that destroys standard coatings. Our TT8115 grade is engineered with a proprietary thick Al2O3 layer that provides an impenetrable shield. The PC chipbreaker is the result of thousands of hours of R&D, designed to ensure that chips are controlled even at light feeds. When you choose TaeguTec, you invest in industrial reliability that maximizes your machine uptime and delivers world-class surface Ra quality.
Verified Global Feedback
"Cast Iron Specialist"
We use these on GGG50 castings. The tool life is double what we were getting from our previous supplier. Stable and sharp.
— Cast-Components Corp (USA)"Präzision in der Serie"
Excellent surface finish on gray iron parts. The PC geometry works perfectly at light finishing depths. Very reliable.
— Automobil-Technik (Germany)"Ottima Resistenza"
TT8115 is fantastic for high-speed runs. We reached 400m/min and the edge remained clean. High productivity.
— Officina Meccanica (Italy)"Consistent Quality"
Reliable performance in ductile iron. The 0.4 radius allows for very precise geometries on small components.
— Sato Engineering (Japan)Frequently Asked Questions
1. Is TT8115 better than TT8125 for interrupted cuts?
No. TT8115 is a high-hardness grade for high-speed continuous finishing. For interrupted cuts, TT8125 is recommended for its superior toughness.
2. Can I use this for Stainless Steel?
CVD grades for cast iron are generally not optimized for Stainless (ISO M). For stainless, we recommend TT9225 or the PVD TT9080 grade.
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.