BEYOND WC20-2D-SD15.5-WC03 Indexable U-Drill | 15.5mm CNC Fast Drill Body
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BEYOND WC20-2D-SD15.5-WC03
Precision 15.5mm 2D Indexable U-Drill | High-Performance CNC Boring Body
Rapid 15.5mm Indexable Hole Boring
The BEYOND WC20-2D-SD15.5-WC03 is a professional-grade indexable insert drill engineered for heavy-duty metal removal. As a specialized fast hole U-drill, it features a 15.5mm cutting diameter with a 2D depth ratio and a compact 20mm shank. Optimized for CNC lathe metal boring, this internal cooling drill ensures superior chip evacuation and thermal stability in steel, alloy, and stainless steel workpieces.
Model Identification Guide
Technical Data & Metric/Imperial Reference
| Feature | Metric Model (mm) | Imperial Equivalent (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 15.5 mm | ~0.610" |
| Shank Diameter | 20.0 mm | 0.787" |
| Max Drilling Depth (2D) | 31.0 mm | 1.220" |
| Product Model | WC20-2D-SD15.5 | WC0.78-2D-SD0.61 |
Premium 20CrMnTi Alloy & Spiral Flute Geometry
Durable Body Material: This indexable drill body is forged from 20CrMnTi alloy steel, treated with vacuum quenching for extreme surface hardness and a shock-absorbing core. This ensures the tool withstands the high torque of high-speed drilling without deformation.
Spiral Flute Geometry (U-Slot): The spiral flute geometry is precision-machined to facilitate rapid chip evacuation. Combined with dual internal cooling holes, it flushes chips away instantly, preventing re-cutting and heat buildup in shallow hole drilling.
Recommended Cutting Parameters
Optimize your 15.5mm U-drill performance with these baseline settings:
- Cutting Speed (Vc): 110 - 190 m/min (Standard Steel).
- Feed Rate (f): 0.05 - 0.12 mm/rev.
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 15.5}$$
- Coolant Strategy: High-pressure internal cooling is mandatory.
WC Type U-Drill: Advantages & Considerations
- Uses WC series trigon inserts with 3 cutting edges (cost-efficient).
- Exceptional stability on angled or curved entry surfaces.
- Lower spindle load compared to square insert designs.
- Roughing tool; hole tolerance is (+0.1 / -0.2mm).
- Dependent on internal coolant pressure for chip breaking.
Verified Customer Feedback
"Solid Build Quality"
"Rigidity is excellent for a 15.5mm drill. Using it on 4140 steel and it's holding up perfectly."
- Robert H. (USA)"Highly Recommended"
"Fast delivery to Japan. The body finish is professional and insert fit is tight."
- Kenji A. (Japan)"Top Tier Value"
"Much cheaper than local brands but the performance is identical in our CNC shop."
- Markus L. (Germany)"Smooth drilling"
- Luca B. (Italy)
"Reliable BEYOND tool"
- François T. (France)
Expert Q&A
Q: Does this include the Torx wrench and screws?
A: Yes, each BEYOND drill body includes the necessary high-strength screws and the correct Torx wrench.
Q: Can I use this for boring out existing holes?
A: Yes, U-drills are excellent for both starting from solid and enlarging existing holes.
Q: Is internal cooling mandatory?
A: Yes. At 15.5mm, chips will pack quickly without internal coolant pressure to flush them out.
Quick Tip: 2D-5D CNC Drill Selection
Choosing the right depth is crucial. 2D drills (like this SD15.5 model) offer maximum rigidity and are best for high-feed roughing. 3D to 5D drills allow for deeper holes but require significantly higher coolant pressure and reduced feed rates to avoid tool deflection.
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.