TaeguTec CNMG120408MT TT5080 | Heavy-Duty Cast Iron Turning Insert
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TaeguTec CNMG120408MT TT5080
The Shock-Resistance Champion: High-Toughness CVD Grade for Demanding Cast Iron Operations
Product Overview
"Which carbide insert grade is most reliable for interrupted turning on abrasive gray or ductile iron castings?"
The TaeguTec CNMG120408MT TT5080 is an 80° rhombic turning insert purpose-built for ISO K (Cast Iron). While standard inserts often suffer from thermal cracking or edge chipping in cast iron, the TT5080 CVD grade features a specialized thick alumina coating and a high-toughness substrate designed to absorb mechanical impact. The MT (Medium-Tough) chipbreaker provides a reinforced cutting edge that excels in unstable conditions, while the 0.8mm radius offers increased edge strength for heavier depths of cut and roughing-to-finishing versatility.
Key Features
Thick thermal and abrasive barrier coating engineered specifically for the unique wear patterns of cast iron.
Reinforced geometry prevents micro-chipping even when machining through rough casting skins or blowholes.
A sub-micron tough substrate that provides the stability needed for heavy interrupted cuts and non-rigid setups.
Technical Specifications
ISO Code Decoding: CNMG120408MT
80° Rhom
0° Relief
Tolerance
Fixing
12.7mm L
4.76mm S
0.8mm RE
Medium
| Unit System | Designation | I.C. Size | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | CNMG120408MT | 12.7 mm | 0.8 mm |
| Imperial (ANSI) | CNMG432MT | 0.500" | 0.031" |
Recommended Cutting Parameters (ISO K)
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Gray Cast Iron (HB 180-250) | 150 - 320 m/min | 0.15 - 0.45 mm/rev |
| Ductile Iron (HB 160-250) | 120 - 280 m/min | 0.12 - 0.40 mm/rev |
Compatible Toolholders
This insert fits all standard DCLNR/L 12, PCLNR/L 12, and MCLNR/L 12 toolholders and boring bars.
Product Applications
- Roughing to medium turning of engine blocks, pump housings, and brake discs.
- Interrupted cutting on large cast iron gears and agricultural machinery parts.
- Machining gray and nodular cast iron with inconsistent material hardness.
- Heavy-duty CNC operations where tool life predictability is critical.
TaeguTec Cast Iron Grade Comparison
| Grade Name | Technology Profile | Primary Application |
|---|---|---|
| TT5080 (CVD) | Maximum Toughness | Interrupted Cuts: Shock resistance focus. |
| TT5100 (CVD) | Wear Resistance | Continuous: High-speed finishing. |
Why Choose TaeguTec?
A flagship brand within the IMC Group, TaeguTec leads the global industry in difficult-to-cut material solutions. The TT5080 grade represents the peak of cast iron machining technology, engineered to handle the thermal and mechanical stresses of modern high-volume manufacturing. When you choose TaeguTec, you invest in industrial-grade consistency that reduces machine downtime, prevents scrap parts, and ensures the lowest cost-per-cut in professional CNC workshops.
Verified Global Feedback
"Reliable on Rough Castings"
We machine raw gray iron housings. Switched to TT5080 because our previous inserts were shattering on the surface skin. These take the hit and keep going.
— Cast Components Inc. (USA)"Top Tier for Ductile Iron"
Predictable tool life is everything for us. The TT5080 is remarkably consistent. The 0.8mm radius gives a very strong edge.
— Gusswerke Schmidt (Germany)"Great for Interrupted Cuts"
Our part has four bolt holes on the face. The MT chipbreaker handles the interruption perfectly. Very stable performance on our CNC lathes.
— Precision Industry (Japan)Frequently Asked Questions
1. Is TT5080 better for finishing or roughing?
The 0.8mm radius and MT breaker make it ideal for roughing and medium turning. For high-speed finishing on stable surfaces, we suggest our TT5100 grade.
2. Can I use this on Steel (ISO P)?
While it can turn some steels, its coating is optimized for the abrasive wear of Cast Iron. For steel turning, our TT9225 grade is the standard recommendation.
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.