Taegutec TDT 4E-0.4 TT7220 Carbide Insert for Steel Turning & Grooving (10pcs)
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TaeguTec TDT 4E-0.4 TT7220
High-Speed 4.0mm Multi-Directional Insert for Maximum Productivity in Steel & Iron
Product Overview
"Which 4mm insert offers the best wear resistance for high-speed profiling and side-turning in alloy steels?"
The TaeguTec TDT 4E-0.4 TT7220 is engineered for high-efficiency multi-directional turning and grooving. While the TT9080 grade focuses on toughness for interrupted cuts, the TT7220 grade is optimized for abrasive wear resistance and thermal stability. This makes it the superior choice for high-speed finishing and medium machining of Carbon Steels (ISO P) and Gray Cast Iron (ISO K). The 4E neutral chipbreaker geometry is designed to compress and break chips effectively during both radial plunging and longitudinal turning, ensuring that your CNC turret stays clear of "bird-nesting" during long production runs.
Core Advantages
The TT7220 PVD coating allows for significantly higher cutting speeds (Vc) compared to universal grades, reducing cycle times by up to 25%.
The 0.4mm corner radius and stable T-Turn seating provide a high-quality surface finish (Ra), often eliminating the need for secondary grinding.
Switch from radial grooving to axial turning seamlessly. Perfect for complex profiling on CNC lathes and Swiss machines.
Technical Specifications
Model Decoding: TDT 4E-0.4 TT7220
T-Turn
4.0mm
Neutral
Radius
High-Speed
| Unit | Insert Width | Corner Radius | Model Reference |
|---|---|---|---|
| Metric | 4.00 mm | 0.40 mm | TDT 4E-0.4 |
| Imperial | 0.157" | 0.016" | TDT 157E-016 |
Recommended Cutting Parameters (TT7220)
| Operation | Speed (Vc) | Feed (fn) |
|---|---|---|
| Longitudinal Turning | 120 - 220 m/min | 0.12 - 0.28 mm/rev |
| Radial Grooving | 100 - 180 m/min | 0.08 - 0.20 mm/rev |
System Compatibility
Applications & Compatibility
- High-Speed Finishing: Best for finishing operations on Steel and Iron where Ra requirements are strict.
- Profiling & Undercutting: The neutral geometry allows for complex paths and relief grooving.
- Abrasive Materials: Excels in machining Gray Cast Iron (ISO K) and medium-carbon Steels.
- Hardware Support: Compatible with all T-Turn series holders and boring bars with Seat Size 4.
TaeguTec Grade Benchmarking
| Grade | ISO Field | Key Performance Factor |
|---|---|---|
| TT7220 | P, K | High-Speed Machining & Wear Resistance |
| TT9080 | P, M, K | General Purpose & Interrupted Cutting |
| TT5100 | K | Extreme CVD Resistance for Cast Iron Only |
Reliability Meets Productivity
TaeguTec's T-Turn system is the industry benchmark for multi-directional grooving. The TDT 4E-0.4 TT7220 provides the thermal stability needed for high-speed CNC environments.
"Switched from the universal grade to TT7220 for a high-volume steel project. Tool life increased by 40%."
— David K., USA"Hervorragende Oberflächengüte beim Längsdrehen. Keine Gratbildung mehr."
— Stefan W., Germany"Ottimo per la finitura di ghisa. Stabilità termica eccezionale ad alte velocità."
— Andrea B., Italy"Very consistent performance in profiling. The chips break perfectly even at higher feeds."
— Kenji O., JapanFrequently Asked Questions
A: While TT7220 can handle light interruptions, for heavy shocks or unstable setups, the TT9080 grade is recommended due to its higher substrate toughness.
A: Generally, yes. The 4.0mm width provides more lateral stability and mass, allowing for slightly higher feed rates during side-turning operations.
A: While TT7220 is thermally stable, using high-pressure coolant will significantly enhance chip evacuation and prevent notch wear during high-speed profiling.
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.