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.
Need Help With BEYOND Inserts?
Looking for a BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.