TaeguTec CNMG120408MT CT3000 | Cermet Turning Insert for Finishing
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TaeguTec CNMG120408MT CT3000
Master of Mirror Finishes: High-Speed Cermet Technology for Professional Steel Machining
Product Overview
"Which insert grade provides the best surface Ra when finishing carbon steel at high cutting speeds without tool-edge oxidation?"
The TaeguTec CNMG120408MT CT3000 is an 80° rhombic turning insert purpose-built for ISO P (Steel) finishing. Featuring the advanced CT3000 Cermet (Ceramic-Metal) grade, this insert offers exceptional chemical stability and resistance to built-up edge (BUE). Unlike traditional carbide, Cermet maintains its sharp edge at high temperatures, allowing for mirror-like surface finishes. The MT chipbreaker is designed for medium-to-light finishing, ensuring stable chip control and low cutting resistance across a variety of steel alloys.
Key Features
Superior resistance to oxidation and wear at high speeds compared to standard carbide grades.
Optimized for medium-to-light finishing, providing smooth shearing and reduced spindle vibration.
Designed to achieve the lowest possible surface Ra, eliminating the need for secondary polishing.
Technical Specifications
ISO Code Decoding: CNMG120408MT
80° Rhom
0° Relief
Tolerance
Fixing
12.7mm L
4.76mm S
0.8mm RE
Finishing
| Unit System | Designation | I.C. Dimension | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | CNMG120408MT | 12.7 mm | 0.8 mm |
| Imperial (ANSI) | CNMG432MT | 0.500" | 0.031" |
Recommended Cutting Parameters (ISO P)
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Low Carbon Steel | 280 - 650 m/min | 0.08 - 0.35 mm/rev |
| Alloy Steel | 200 - 450 m/min | 0.10 - 0.30 mm/rev |
Recommended Toolholders
Standard fit for DCLNR/L 12, PCLNR/L 12, and MCLNR/L 12 external turning and boring bars.
Product Applications
- High-speed finishing of carbon and alloy steel components.
- Precision turning where tight Ra surface finish requirements are mandatory.
- CNC mass production cycles for shafts, sleeves, and engine components.
- Excellent for dry machining of steel where thermal stability is needed.
TaeguTec Cermet Benchmark
| Grade Name | Technology Profile | Primary Application |
|---|---|---|
| CT3000 (Cermet) | Uncoated Ceramic-Metal | Finishing: Highest surface brightness. |
| PV3010 (PVD Cermet) | PVD Coated Cermet | Versatile: Added wear resistance for tough steel. |
Why Choose TaeguTec?
As a premier brand within the IMC Group, TaeguTec represents the pinnacle of industrial cutting technology. The CT3000 series is the result of exhaustive metallurgical engineering, providing the chemical stability needed for professional-grade finishing. By choosing TaeguTec, you are investing in industrial consistency that minimizes tool changes, protects your machinery, and ensures every part meets the highest cosmetic and dimensional standards in global manufacturing.
Verified Global Feedback
"Mirror Finish on 4140"
We switched to CT3000 for finishing cycles. The Ra value is incredible. It looks like the part was polished. Very stable at high speeds.
— Precision Engineering (USA)"Reliable Cermet Grade"
Outstanding performance on carbon steel shafts. The MT chipbreaker works exactly as described even at light feeds. No chatter.
— Maschinenbau Schmidt (Germany)"High Speed Finishing"
Consistent edge life. We run these very fast on our CNC lathes and the dimensional stability is spot on for the entire shift.
— Aero Components (Japan)Frequently Asked Questions
1. Is Cermet suitable for interrupted cuts?
Cermet is more brittle than tungsten carbide. It is primarily recommended for stable, continuous finishing. For interrupted cuts, we recommend TaeguTec's TT9225 grade.
2. Can I use this for Stainless Steel?
Cermet is best optimized for ISO P (Carbon and Alloy Steel). For high-performance stainless steel turning, please use our TT8020 PVD grades.
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.