Taegutec TDT 8.00E-1.20 TT7220 Insert for Heavy Steel Turning & Grooving (10pcs)
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TaeguTec TDT 8.00E-1.20 TT7220
Heavy-Duty 8.0mm Multi-Directional PVD Insert for Steel & Iron Production
Product Overview
"Which 8mm insert provides the best heat resistance for high-speed multi-directional turning in alloy steels?"
The TaeguTec TDT 8.00E-1.20 TT7220 is an industrial-grade solution for heavy material removal. With an 8.0mm width and a robust 1.20mm corner radius, this insert is designed for high-stability axial turning and radial grooving. The TT7220 grade is a premium PVD-coated carbide that features excellent thermal stability and wear resistance, making it the top choice for Carbon Steel (ISO P) and Cast Iron (ISO K). The E-type neutral geometry combined with the TT7220 coating allows for consistent chip breaking even at the high temperatures generated by high-speed CNC production lines.
Key Features
Advanced sub-micron substrate with multi-layer PVD coating provides extreme resistance to notch wear and plastic deformation.
Massive 8.0mm width allows for aggressive feed rates and high-depth axial turning without compromising tool integrity.
Optimized for profiling, side-turning, and plunging, reducing cycle time by eliminating unnecessary tool changes.
Technical Specifications
Model Decoding: TDT 8.00E-1.20 TT7220
T-Turn
Width (mm)
Neutral
Radius (mm)
PVD Grade
| Unit System | Width (W) | Corner Radius | Model Reference |
|---|---|---|---|
| Metric | 8.00 mm | 1.20 mm | TDT 8.00E-1.20 |
| Imperial | 0.315" | 0.047" | TDT 315E-047 |
Recommended Cutting Data (TT7220 Grade)
| Material | Vc (m/min) | fn (mm/rev) |
|---|---|---|
| Carbon Steel | 160 - 240 | 0.15 - 0.40 |
| Gray Cast Iron | 140 - 220 | 0.18 - 0.45 |
Seating & Tooling
Applications & Compatibility
- Industrial Shafts: High-feed side turning on large-diameter carbon steel shafts.
- Heavy Profiling: Generating complex contours and fillets in cast iron housings.
- Deep Grooving: Stable 8.0mm plunging in alloy steels.
- Hardware Compatibility: Fits all TaeguTec T-Turn series holders (External & Boring Bars) with Seat Size 8.
TaeguTec Grade Comparison Matrix
| Grade | ISO Field | Coating | Primary Strength |
|---|---|---|---|
| TT7220 | P, K | PVD | High Speed & Steel Wear Resistance |
| TT9080 | P, M, K | PVD | Toughness & Universal Applications |
| K10 | N, K | None | Sharpness for Aluminum Finishing |
Why Machinists Trust TaeguTec
The TDT 8.00E-1.20 TT7220 represents the pinnacle of multi-directional turning technology. By combining a wide-body profile with advanced PVD heat-shielding, TaeguTec allows you to push your CNC machines to their absolute limit while maintaining surgical accuracy.
"TT7220 handles the heat exceptionally well. We've seen a 30% increase in tool life on our 4140 steel shafts."
— James K., USA"Sehr stabiler Plattensitz. Die 8mm Breite ermöglicht enorme Vorschübe bei der Gussbearbeitung."
— Dieter R., Germany"Prestazioni costanti. Ottima per la tornitura laterale su pezzi di grandi dimensioni."
— Antonio V., Italy"Reduced our cycle time significantly. The PVD coating is very durable against notch wear."
— Takashi M., JapanFrequently Asked Questions
A: While TT7220 is very wear-resistant, for heavy interrupted cuts, we recommend switching to the TT9080 grade for better impact toughness.
A: In stable conditions, you can achieve an axial turning depth (Ap) of 1.5mm - 4.5mm in most carbon steels.
A: TT7220 performs exceptionally well with flood coolant, but high-pressure coolant will further extend tool life in high-temp steel machining.
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.