BEYOND WC25-5D-SD21.5-WC04 U-Drill | 21.5mm Indexable Insert Drill
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BEYOND WC25-5D-SD21.5-WC04
High-Precision 5D Indexable U-Drill | Deep Hole Machining Specialist
Industrial-Grade 21.5mm CNC Drilling
The BEYOND WC25-5D-SD21.5-WC04 is a professional-grade indexable insert drill designed for high-efficiency metal removal. Featuring a 21.5mm cutting diameter and a 5D depth-to-diameter ratio, this tool is the ultimate choice for high-speed internal cooling drilling. It provides exceptional stability and superior chip evacuation when processing carbon steel, alloy steel, and stainless steel.
Model Code Explained
Technical Specifications (Metric vs. Imperial)
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 21.5 mm | 0.846" |
| Shank Diameter | 25.0 mm | 0.984" |
| Max Drilling Depth (5D) | 107.5 mm | 4.232" |
Recommended Cutting Parameters
Maximize your CNC machine tool productivity with these reference values:
- Cutting Speed (Vc): 110 - 170 m/min (Adjust based on material).
- Feed Rate (f): 0.05 - 0.12 mm/rev.
- Coolant: High-pressure internal cooling is mandatory for 5D depth to clear chips effectively.
Advanced Material & Wide Spiral Flute
Crafted from high-performance alloy steel with specialized heat treatment, this WC04 insert holder offers extreme rigidity and anti-vibration properties. The spiral flute geometry is wide-designed for "forced" chip evacuation, which prevents chip-packing—the leading cause of tool failure in 21.5mm deep hole drilling. This nickel-plated body ensures corrosion resistance and reduced friction during high-speed drilling.
WC Series U-Drill: Advantages & Disadvantages
- Uses WCMX / WCMT inserts with 4 cutting edges (Cost-effective).
- Better stability on uneven surfaces compared to SP drills.
- Ideal for large hole CNC drilling with high feed rates.
- Requires higher torque from the spindle.
- Sensitive to spindle alignment for deep 5D precision.
Pro-Tip: Choosing Drill Depth (2D to 5D)
The L/D ratio determines stability and application range in CNC metalworking:
- 2D/3D: Maximum rigidity. Best for high-speed shallow holes.
- 4D: The universal standard for general-purpose machining.
- 5D (This Model): Specialized deep-hole drill. Provides deep penetration but requires high-pressure internal coolant to ensure straightness and tool longevity.
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.