BEYOND WC25-4D-SD20.5-WC03 U-Drill | 20.5mm Indexable Insert Drill (4D Depth)
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BEYOND WC25-4D-SD20.5-WC03
High-Precision 4D Indexable U-Drill | 20.5mm Industrial CNC Tooling
Efficient 20.5mm Indexable Holemaking
The BEYOND WC25-4D-SD20.5-WC03 is a high-rigidity indexable insert drill engineered for rapid metal removal. Featuring a 20.5mm cutting diameter and a 4D depth-to-diameter ratio, this tool is the professional choice for high-speed internal cooling drilling. It is optimized for heavy-duty CNC machining in carbon steel, alloy steel, and stainless steel, providing superior chip evacuation and surface finish.
Model Code Specification
Technical Data & Metric/Imperial Comparison
| Feature | Metric Model (mm) | Imperial Equivalent (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 20.5 mm | 0.807" |
| Shank Diameter | 25.0 mm | 0.984" |
| Max Drilling Depth (4D) | 82.0 mm | 3.228" |
Recommended Cutting Parameters
Ensure peak CNC holemaking performance with these recommended settings:
- Cutting Speed (Vc): 100 - 180 m/min (Material dependent).
- Feed Rate (f): 0.05 - 0.12 mm/rev.
- Coolant Requirements: High-pressure internal cooling is required for deep-hole chip removal.
Premium Material & Optimized Spiral Flute
Constructed from high-performance alloy steel with specialized vacuum quenching, this WC03 insert holder ensures maximum toughness. The optimized spiral flute geometry is designed for efficient long-chip breaking, preventing the clogging often seen in 20.5mm fast drilling. The nickel-plated surface prevents corrosion and ensures smooth chip flow.
WC Series U-Drill: Pros & Cons
- Trigon WCMX / WCMT inserts provide 3 cutting edges (Economic).
- Stable drilling even on sloped entry surfaces.
- Lower cutting resistance compared to SP series.
- Requires high-pressure coolant for best results.
- Tolerance is roughly +0.1/+0.2mm; not for ultra-precision H7 bores.
Verified Customer Feedback
"Great rigidity for 20.5mm holes. The 4D length is perfect for our valve blocks."
- Marcus L., Germany ⭐⭐⭐⭐⭐
"Very fast shipping to Sydney. Tool body is high quality steel."
- John D., Australia ⭐⭐⭐⭐⭐
"Perfect performance on our CNC Lathe. Using WCMX03 inserts."
- Kenji Y., Japan ⭐⭐⭐⭐⭐
"Price is very competitive compared to local suppliers. Good tool life."
- Robert P., USA ⭐⭐⭐⭐⭐
"Excellent chip flow. No vibration at high speeds."
- Luca F., Italy ⭐⭐⭐⭐⭐
Product Q&A
Q: Does this include the WCMT03 carbide inserts?
A: No, this is the 20.5mm U-drill body only. Inserts must be purchased separately.
Q: What is the recommended coolant pressure?
A: For a 4D depth, we recommend at least 1.5 - 2.0 MPa for reliable chip evacuation.
Q: Can I use this for blind holes?
A: Yes, it is ideal for blind holes as it creates a relatively flat bottom.
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 deep 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.