Taegutec TDC4 TT7220 Carbide Grooving Insert for Steel Parting (10pcs)
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TaeguTec TDC4 TT7220
High-Rigidity 4.0mm Solution for High-Speed Steel & Cast Iron Machining
Product Overview
"Which 4mm parting insert provides the best thermal stability for high-velocity cutting of alloy steels and cast iron?"
The TaeguTec TDC4 TT7220 is a precision-engineered, double-ended 4mm insert designed for high-productivity Parting and Grooving. Utilizing the advanced TT7220 PVD grade—a specialized coating optimized for heat resistance—this tool is the industry benchmark for ISO P (Steel) and ISO K (Cast Iron). The 4.0mm width provides massive lateral stability, allowing for deeper radial cuts and higher feed rates without the risk of blade deflection. Its TDC chipbreaker geometry effectively compresses and narrows the chips, ensuring they exit the groove without marring the surface finish of the workpiece.
Core Advantages
Specially developed PVD coating that maintains edge hardness at high cutting temperatures, preventing plastic deformation.
The 4mm insert width offers significantly higher resistance to twisting forces compared to 2mm or 3mm variants, ideal for large bar work.
The concave TDC breaker ensures chips are narrower than the slot, providing zero-friction evacuation in deep grooving.
Technical Specifications
Model Decoding: TDC 4 TT7220
TaeguTec
Double Edge
Chipbreaker
4.0mm Width
Steel PVD
| Unit | Insert Width (W) | Metric Model | Imperial Model |
|---|---|---|---|
| Metric | 4.00 mm | TDC 4 | - |
| Imperial | 0.157" | - | TDC 157 |
Recommended Cutting Parameters (TT7220)
| Material Group | Speed (Vc m/min) | Feed (fn mm/rev) |
|---|---|---|
| Alloy Steel (P) | 130 - 260 | 0.10 - 0.25 |
| Cast Iron (K) | 110 - 210 | 0.12 - 0.28 |
Required Tooling
Applications & Compatibility
- Heavy Duty Parting: Optimized for solid bars up to 80mm+ diameter.
- Industrial Grooving: High stability for deep grooves in large components.
- High-Speed Production: Best performance in high-velocity CNC cycles.
- System Compatibility: Designed for TaeguTec T-Clamp series (Seat Size 4).
Grade Performance Comparison
| Grade | ISO Area | Coating Type | Best For |
|---|---|---|---|
| TT7220 | P, K | Advanced PVD | High Velocity / Steel & Iron |
| TT9030 | P, M, K, S | Universal PVD | General Purpose / Toughness |
Why Choose Our Tooling
Authentic TaeguTec tooling provides industrial-grade repeatability. We supply high-precision inserts that ensure your spindle uptime is maximized while reducing the cost-per-cut in heavy-duty applications.
"The 4mm width is incredibly stable. We use the TT7220 grade for all our high-speed steel parting on the Mazak."
— Robert D., USA"Hervorragend für Gusseisen. Standzeit ist im Vergleich zu Wettbewerbern fast doppelt so hoch."
— Dieter S., Germany"La migliore stabilità laterale che abbia mai provato per scanalature profonde."
— Andrea M., Italy"Great performance on alloyed steel. Chips are broken perfectly."
— Hiroshi K., Japan"Authentic product. The TDC4 handles heavy feeds much better than the 3mm version."
— Thomas G., UKFrequently Asked Questions
A: No. TDC4 requires a "Seat Size 4" holder due to the wider insert pocket dimensions.
A: TT7220 is optimized for Steel and Cast Iron. For Stainless Steel, we recommend the TT8020 grade.
A: For light interruptions it works well, but for heavy interruptions (hex bars), the TT9080 grade is preferred.
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.