TaeguTec CNMG120412 TT7015 | Carbide Turning Insert for Cast Iron
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TaeguTec CNMG120412 TT7015
Master of Cast Iron: High-Speed CVD Grade for Maximum Productivity
Product Overview
"Which insert grade provides the longest tool life and best edge stability when roughing abrasive gray or nodular cast iron at high speeds?"
The TaeguTec CNMG120412 TT7015 is a heavy-duty 80° rhombic turning insert purpose-built for ISO K (Cast Iron). Equipped with an advanced CVD (Chemical Vapor Deposition) coating, the TT7015 grade is engineered to resist the intense abrasive wear and thermal cycling inherent in high-speed cast iron machining. With a robust 1.2mm corner radius, this insert is optimized for increased feed rates and depth of cut, providing exceptional edge strength for both gray (GG) and ductile/nodular (GGG) cast iron components.
Key Features
Thick alumina multi-layer coating provides a superior thermal barrier against crater wear and deformation.
The 1.2mm radius (047") allows for higher feed rates and significantly reduces the risk of edge chipping under heavy loads.
Optimized substrate chemistry maintains hardness at high temperatures, enabling shorter cycle times.
Technical Specifications
ISO Code Decoding: CNMG120412
80° Rhom.
0° Relief
Tolerance
Fixing
12.9mm L
4.76mm S
1.2mm Rad.
| Unit System | Designation | I.C. (Inscribed Circle) | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | CNMG120412 | 12.7 mm | 1.2 mm |
| Imperial (ANSI) | CNMG433 | 0.500" | 0.047" |
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Gray Cast Iron (GG25) | 250 - 550 m/min | 0.20 - 0.55 mm/rev |
| Ductile Iron (GGG40) | 180 - 380 m/min | 0.20 - 0.50 mm/rev |
Compatible Holders
This insert is engineered for standard DCLNR/L 12, PCLNR/L 12, and MCLNR/L 12 external turning tools.
Product Applications
- High-velocity rough turning of cast iron engine blocks and housings.
- Machining of large nodular iron rollers and industrial shafts.
- Production turning of gray iron brake components and drums.
- Heavy roughing operations where edge durability is the primary constraint.
TaeguTec Grade Benchmarking (Cast Iron)
| Grade Name | Coating Type | Best For |
|---|---|---|
| TT7015 (CVD) | Hard Multi-Layer CVD | Primary: Max speed, continuous turning. |
| TT7025 (CVD) | Tough CVD | Secondary: Interrupted cuts & general purpose. |
Why Choose TaeguTec?
TaeguTec, a member of the IMC Group, is a global leader in high-performance metallurgy. The TT7015 grade represents the pinnacle of cast iron turning technology. By choosing TaeguTec, you invest in tools that reduce tool changes, increase spindle uptime, and provide consistent dimensional accuracy in high-volume production environments.
Verified Global Feedback
"Massive Life Increase"
Replaced our previous grade with TT7015 for GGG60 parts. We increased the feed by 20% and still doubled our tool life.
— Precision Foundry (USA)"Ideal for Abrasive Cuts"
The 1.2 radius is very robust. We use this for roughing engine manifolds and it never chips prematurely.
— Automotive Tech GmbH (Germany)"Stable at High Vc"
Outstanding heat resistance. Even with blue chips in dry cutting, the edge remains sharp for a long time.
— 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. Why use a 1.2mm radius instead of 0.8mm?
A 1.2mm radius offers significantly more edge strength, allowing for heavier roughing and higher feed rates, which is critical in large cast iron parts.
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.