BEYOND WC25-2D-SD21.5-WC04 Indexable U-Drill | 21.5mm CNC Fast Hole Drill Body
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BEYOND WC25-2D-SD21.5-WC04
Professional 21.5mm 2D Indexable U-Drill | High-Speed CNC Metal Boring Body
High-Efficiency 21.5mm Indexable Fast Hole Drilling
The BEYOND WC25-2D-SD21.5-WC04 is an industrial-grade indexable insert drill engineered for rapid material removal in CNC machining centers. As a specialized fast hole U-drill, it features a 21.5mm cutting diameter with a 2D depth ratio and a 25mm straight shank. This tool is optimized for internal cooling drilling in carbon steel, alloy steel, and stainless steel, ensuring maximum productivity for large diameter metal boring projects.
Model Code Specification Breakdown
Technical Data & Metric/Imperial Comparison
| Feature | Metric Model (mm) | Imperial Equivalent (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 21.5 mm | 0.846" |
| Shank Diameter | 25.0 mm | 0.984" |
| Max Drilling Depth (2D) | 43.0 mm | 1.693" |
| Product Model | WC25-2D-SD21.5 | WC0.98-2D-SD0.84 |
Advanced 20CrMnTi Alloy & Spiral Flute Geometry
Premium Body Material: This 21.5mm U-drill is crafted from high-strength 20CrMnTi alloy steel, subjected to vacuum quenching for superior surface hardness and anti-vibration performance. This ensures the indexable drill body remains stable under the high temperatures of high-speed drilling.
Optimized Spiral Flute (U-Slot): Features an enlarged spiral flute designed for rapid chip evacuation. The precision U-groove geometry facilitates smooth chip discharge via internal cooling holes, which is critical for preventing heat buildup in shallow hole drilling.
Recommended Cutting Parameters
Optimize your 21.5mm U-drill performance with these baseline settings:
- Cutting Speed (Vc): 120 - 200 m/min (Material dependent).
- Feed Rate (f): 0.05 - 0.14 mm/rev.
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 21.5}$$
- Coolant Strategy: Internal cooling is mandatory for effective chip flushing.
WC Type U-Drill: Advantages & Considerations
- Uses WC series trigon inserts with 3 usable cutting edges (Highly economical).
- Stable entry even on uneven or sloped workpiece surfaces.
- Lower cutting resistance compared to square insert drills.
- Hole tolerance is typical for roughing (+0.1/-0.2mm).
- Requires stable high-pressure internal coolant.
Verified Customer Feedback
"Solid Body Rigidity"
Dieter K. (Germany)
"Perfect for 21.5mm"
Mark S. (USA)
"Rapid Chip Clearing"
Hiroshi Y. (Japan)
"BEYOND Quality"
Luca R. (Italy)
"Excellent value"
Mateo S. (Spain)
Frequently Asked Questions
Q: Does this include the Torx wrench and screws?
A: Yes, each BEYOND drill body includes the necessary insert screws and the correct Torx wrench.
Q: Can I use this for blind holes?
A: Yes. The WC U-drill provides a relatively flat bottom, perfect for blind hole boring in CNC operations.
Q: Is internal cooling mandatory?
A: Yes, at 21.5mm, internal cooling is highly recommended to flush chips and prevent overheating.
Quick Tip: 2D-5D CNC Drill Selection
Choosing the right depth is crucial. 2D drills (like this SD21.5 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.