TaeguTec CNMG120404 TT7015 | Carbide Turning Insert for Cast Iron
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TaeguTec CNMG120404 TT7015
The Cast Iron Specialist: Ultimate Wear Resistance for High-Speed Turning
Product Overview
"Which carbide insert grade is best for achieving long tool life and high-speed stability when machining abrasive gray and nodular cast iron?"
The TaeguTec CNMG120404 TT7015 is a high-performance 80° rhombic insert purpose-built for ISO K (Cast Iron) machining. Featuring a specialized CVD (Chemical Vapor Deposition) coating, the TT7015 grade is characterized by its extreme hardness and superior resistance to abrasive wear. This insert is designed to handle the high temperatures generated during high-velocity turning of gray cast iron (GG) and ductile/nodular cast iron (GGG), ensuring dimensional consistency and excellent surface Ra over long production cycles.
Key Features
Thick alumina layer provides an exceptional heat barrier, preventing edge deformation at high cutting speeds.
Specifically formulated substrate to withstand the highly abrasive nature of cast iron chips.
The 0.4mm corner radius (016") provides a sharp cutting action for finishing and light-medium turning operations.
Technical Specifications
ISO Code Explanation: CNMG120404
80° Rhom.
0° Relief
Tolerance
Hole/Chip
12.9mm L
4.76mm S
0.4mm Rad.
| Unit System | Designation | I.C. (Inscribed Circle) | Corner Radius (RE) |
|---|---|---|---|
| Metric (ISO) | CNMG120404 | 12.7 mm | 0.4 mm |
| Imperial (ANSI) | CNMG431 | 0.500" | 0.016" |
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Gray Cast Iron (GG) | 250 - 500 m/min | 0.15 - 0.45 mm/rev |
| Ductile Cast Iron (GGG) | 180 - 350 m/min | 0.15 - 0.40 mm/rev |
Compatible Holders
Fits all standard DCLNR/L 12, PCLNR/L 12, and MCLNR/L 12 external holders and boring bars.
Product Applications
- Roughing and finishing of engine blocks and brake discs.
- High-speed turning of ductile iron housings and industrial valves.
- Heavy-duty machining of large cast iron rollers and flywheels.
- Optimized for mass production environments where tool consistency is critical.
TaeguTec Grade Benchmarking (Cast Iron)
| Grade Name | Technology | Primary Application |
|---|---|---|
| TT7015 | High-Hardness CVD | Best for: Continuous, high-speed turning of cast iron. |
| TT7025 | Tough CVD | Best for: Interrupted cuts and general purpose cast iron. |
Why Choose TaeguTec?
TaeguTec, a member of the IMC Group (Berkshire Hathaway), is a global innovator in metallurgy. The TT7015 grade represents the gold standard for cast iron turning. By choosing TaeguTec, you are investing in tools that reduce cycle times, decrease machine downtime, and provide the lowest cost-per-part in high-volume industrial manufacturing.
Verified Global Feedback
"Cast Iron Miracle"
We increased our cutting speed on GGG40 parts by 30% after switching to TT7015. Tool life is incredible.
— Automotive Foundry (USA)"Top Performance"
Outstanding resistance to abrasive wear. We use this for all our brake disc production runs.
— Precision Components GmbH (Germany)"Stable at High Speeds"
Very stable performance in continuous cuts. The surface Ra is consistently within spec.
— Industrial Machining (Japan)Frequently Asked Questions
1. Can I use TT7015 for Steel (ISO P)?
TT7015 is specifically optimized for Cast Iron. While it can cut steel, TaeguTec TT9225 or TT9235 are much better suited for ISO P materials.
2. Does this grade require coolant?
TT7015 performs excellently in dry cutting, which is often preferred for cast iron. However, if using coolant, ensure it is flood-delivered to prevent thermal cracking.
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.