Taegutec SPMG07T308DG TT8020 Carbide Insert for CNC U-Drill (10pcs)
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TaeguTec SPMG07T308DG TT8020
Industrial Grade Drilling: Maximum Stability for Steel & Stainless Steel Machining
Product Overview
"Which indexable insert offers the best chip control and tool life when drilling tough alloy steels or stainless components?"
The TaeguTec SPMG07T308DG TT8020 is a high-precision indexable drilling insert engineered for the demanding TOPDRILL and DrillRush series. Utilizing the advanced TT8020 grade, this insert features a multi-layered PVD coating that provides exceptional heat resistance and edge toughness—ideal for ISO P (Steel) and ISO M (Stainless Steel). The DG chipbreaker is specifically designed for drilling applications to ensure effective chip fragmentation and smooth evacuation, which is critical for preventing tool breakage in deep-hole operations.
Core Advantages
A sub-micron substrate with high AlTiN content coating provides extreme oxidation resistance and wear protection at high temperatures.
The DG chipbreaker is optimized for drilling stability, reducing radial cutting forces and ensuring straight hole accuracy.
Designed with a robust 0.8mm corner radius to handle the high impact of entering and exiting the workpiece.
Technical Specifications
ISO Designation Decoding: SPMG 07T308 DG
Square
11° Relief
Tol. Class M
W/ Hole
7.94mm L
3.97mm T
0.8mm RE
| System | Model | Side Length (L) | Thickness (S) |
|---|---|---|---|
| Metric | SPMG 07T308 DG | 7.94 mm | 3.97 mm |
| Imperial | SPMG 2.5(3)2 DG | 0.312" | 0.156" |
Recommended Cutting Parameters
| Workpiece Material | Vc (m/min) | fn (mm/rev) |
|---|---|---|
| Alloy Steel / Tool Steel (P) | 120 - 240 | 0.06 - 0.14 |
| Stainless Steel (M) | 100 - 180 | 0.05 - 0.12 |
Matched Drilling Bodies
Optimized for TaeguTec TOPDRILL and DrillRush bodies (Size 07).
Industrial Applications
- High-speed hole making in automotive powertrain components.
- Reliable drilling of stainless steel flanges and valves.
- Precision hole processing in general machinery and die/mold components.
- Ideal for both lathe and machining center drilling operations.
TaeguTec Drilling Grade Comparison
General purpose excellence. High toughness and heat resistance for P and M groups.
Extreme toughness grade. Best for unstable conditions or interrupted cuts.
The Professional Choice
The SPMG07T308DG is a testament to TaeguTec's commitment to drilling efficiency. By combining a robust 0.8mm radius with the heat-defying TT8020 grade, this insert ensures that your CNC machines run longer with fewer interruptions. It is the gold standard for shops seeking a balance between cost-per-hole and absolute reliability.
"Unmatched Reliability" - We run these in our stainless flange production. Chip breaking is flawless even at high feeds.
— Production Head (USA)Hervorragende Standzeit in legiertem Stahl. Sehr empfehlenswert.
— CNC Meister (Germany)Ottimo grado TT8020. Resistenza al calore eccellente su inox.
— Meccanica di Precisione (Italy)Predictable wear. Great for lights-out manufacturing shifts.
— Tooling Specialist (Japan)Frequently Asked Questions
1. Is internal coolant required for these inserts?
Yes. Internal coolant is highly recommended to ensure the DG chipbreaker can effectively evacuate chips from the hole and to maintain the TT8020's coating integrity.
2. Can I use this for drilling Aluminum?
While possible, the TT8020 grade is optimized for Steel/Stainless. For Aluminum, we recommend TaeguTec's K10 uncoated grades to prevent material adhesion.
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.