BEYOND WC20-4D-SD15.5-WC03 U-Drill | 15.5mm Indexable Insert Drill Body (4D Depth)
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BEYOND WC20-4D-SD15.5-WC03
Precision 4D Indexable U-Drill | 15.5mm Industrial CNC Tooling
High-Speed 15.5mm Indexable Holemaking
The BEYOND WC20-4D-SD15.5-WC03 is a high-rigidity indexable insert drill engineered for rapid metal removal. As a specialized fast hole U-drill, it features a 15.5mm cutting diameter with a 4D depth ratio, making it the definitive choice for high-speed internal cooling drilling. Optimized for heavy-duty CNC machining, it provides exceptional stability in carbon steel, alloy steel, and stainless steel.
Model Code Specification
Technical Data & Units Comparison
| Feature | Metric Model (mm) | Imperial Equivalent (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 15.5 mm | 0.610" |
| Shank Diameter | 20.0 mm | 0.787" |
| Drilling Depth (4D) | 62.0 mm | 2.441" |
Recommended Cutting Parameters
Maximize your CNC metal boring performance with these baseline settings:
- Cutting Speed (Vc): 100 - 180 m/min (Material dependent).
- Feed Rate (f): 0.05 - 0.12 mm/rev.
- Formula: Spindle Speed $N = \frac{Vc \times 1000}{\pi \times D}$
- Coolant: High-pressure internal cooling is mandatory for chip flushing.
Premium Material & Optimized Spiral Flute
Constructed from high-performance quenched alloy steel, this WC03 insert holder ensures maximum toughness. The optimized spiral flute geometry is designed for efficient long-chip breaking and "forced" evacuation, preventing clogging during 15.5mm fast drilling. The nickel-plated surface prevents corrosion and ensures smooth chip flow in high-heat environments.
WC Series U-Drill: Pros & Cons
- Uses WCMX / WCMT inserts with 3 cutting edges (Economic choice).
- Stable drilling on uneven or sloped entry surfaces.
- Lower cutting resistance compared to SP series.
- Requires high-pressure coolant for 4D depths.
- Tolerance is roughly +0.1/+0.2mm; not for H7 bores.
Verified Customer Feedback
"Great rigidity for 15.5mm holes. The 4D length is perfect for our hydraulic blocks."
- Marcus L., Germany ⭐⭐⭐⭐⭐
"Fast shipping to the UK. Tool body is high quality steel and fits WC03 perfectly."
- David H., United Kingdom ⭐⭐⭐⭐⭐
"Excellent price-performance ratio. Much better than our local supplier."
- Kenji Y., Japan ⭐⭐⭐⭐⭐
"Internal cooling works like a charm. No heat buildup in stainless 304."
- Robert P., USA ⭐⭐⭐⭐⭐
"Strong body and perfect nickel plating. Highly recommend BEYOND."
- Luca F., Italy ⭐⭐⭐⭐⭐
Frequently Asked Questions
Q: Does this include the WCMT03 carbide inserts?
A: No, this is the 15.5mm U-drill body only. Inserts must be purchased separately.
Q: What is the benefit of the WC series over the SP series?
A: WC series (Trigon) offer 3 cutting edges and generally have lower cutting resistance, making them better for general-purpose CNC machining.
Q: Can I use this for blind holes?
A: Yes, it is ideal for blind holes as it creates a relatively flat bottom compared to a standard drill.
Pro-Tip: Choosing the Right Depth (2D vs 4D vs 5D)
- 2D/3D: Best for shallow holes; offers maximum rigidity and highest feed rates.
- 4D (This Model): The industrial sweet spot. Versatile for most deep-hole CNC machining needs.
- 5D: Specialized long reach drilling. Requires extreme coolant pressure to maintain hole straightness.
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.