TaeguTec CNMG120404ML TT5080 | Tough Cast Iron Turning Insert
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TaeguTec CNMG120408ML TT5080
Engineered for Impact: High-Toughness CVD Grade for Interrupted Cast Iron Machining
Product Overview
"Which carbide turning insert grade is most reliable for interrupted cuts and abrasive gray iron when tool chipping is the primary failure mode?"
The TaeguTec CNMG120408ML TT5080 is an 80° rhombic insert designed for maximum process reliability in ISO K (Cast Iron) and difficult ISO P (Steel) applications. Featuring the specialized TT5080 CVD grade, it combines a thick alumina thermal barrier with a high-toughness substrate to absorb mechanical shocks. The ML (Medium-Light) chipbreaker geometry reduces cutting resistance and heat generation, while the 0.8mm corner radius provides the reinforced edge strength necessary for medium roughing to finishing cycles in unstable machining conditions.
Key Features
A specialized CVD grade designed to prevent edge micro-chipping during interrupted cuts and crusty casting skins.
Positive rake design minimizes cutting forces and machine spindle load, reducing chatter in long-reach applications.
Reinforced corner design provides a perfect balance between surface Ra quality and industrial-grade durability.
Technical Specifications
Decoding CNMG120408ML
80° Rhom
0° Relief
Tolerance
Clamping
12.7mm IC
4.76mm S
0.8mm RE
Med-Light
| Unit System | Designation | I.C. Size | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | CNMG120408ML | 12.7 mm | 0.8 mm |
| Imperial (ANSI) | CNMG432ML | 0.500" | 0.031" |
Recommended Cutting Parameters (ISO K)
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Gray Cast Iron (GG25) | 180 - 450 m/min | 0.15 - 0.40 mm/rev |
| Ductile Iron (GGG40) | 140 - 320 m/min | 0.12 - 0.35 mm/rev |
Required Toolholders
Matches all standard DCLNR/L 12, PCLNR/L 12, and MCLNR/L 12 external and internal holders.
Product Applications
- Medium roughing to semi-finishing of cast iron motor housings.
- Turning of ductile iron parts with heavy scale or interrupted geometry.
- Machining abrasive cast iron in unstable CNC lathe setups.
- General turning of carbon steel when higher toughness is required than standard grades.
TaeguTec Grade Comparison (Cast Iron)
| Grade Name | Performance Profile | Primary Application |
|---|---|---|
| TT5080 (CVD) | Extreme Toughness | Interrupted: Unstable or heavy impact. |
| TT5100 (CVD) | Maximum Wear Resist | Continuous: High-speed stable finishing. |
Why Choose TaeguTec?
A global leader under the IMC Group umbrella, TaeguTec is defined by metallurgical excellence. The TT5080 grade is the insurance policy for your CNC shop, providing the reliability needed for the most abrasive and high-impact iron castings. By selecting TaeguTec, you invest in industrial consistency that minimizes scrap, protects your spindle, and delivers the lowest total cost-per-part in demanding manufacturing environments.
Verified Global Feedback
"The Solution for Chipping"
We were losing corners to chipping on ductile iron hubs. Switched to TT5080 and haven't had a sudden tool failure since. Very stable.
— Castings Ltd. (Germany)"Great for Unstable Setups"
The ML breaker really reduces chatter on our long-reach boring bars. Excellent performance on abrasive gray iron.
— Precision CNC Works (USA)"Reliable and Consistent"
The 0.8mm radius is very robust. It holds the tolerance across our production runs without surprise edge failure.
— Heavy Industrial (Japan)Frequently Asked Questions
1. When should I choose TT5080 over TT5100?
Choose TT5080 for interrupted cuts or unstable machining. Choose TT5100 for continuous, high-speed stable turning.
2. Can I use this for Stainless Steel?
While TT5080 is very tough, we recommend our specialized ISO M grades for the best chip control in stainless steel.
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.