BEYOND WC25-5D-SD21-WC04 U-Drill | 21mm Indexable Insert Drill (5D Depth)
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BEYOND WC25-5D-SD21-WC04
Professional 5D Indexable U-Drill | Precision Deep Hole CNC Tooling
High-Efficiency 21mm CNC Drilling Solution
The BEYOND WC25-5D-SD21-WC04 is an industrial-grade indexable insert drill engineered for extreme stability. Featuring a 21mm cutting diameter and a 5D depth-to-diameter ratio, this tool is the definitive choice for high-speed internal cooling drilling. It is optimized for processing carbon steel, alloy steel, and stainless steel with maximum structural rigidity during deep-hole CNC drilling.
Model Code Explained
Technical Data & Metric/Imperial Conversion
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 21.0 mm | 0.826" |
| Shank Diameter | 25.0 mm | 0.984" |
| Drilling Depth (5D) | 105.0 mm | 4.133" |
Recommended Cutting Parameters
Optimize your CNC tool performance with these reference values:
- Cutting Speed (Vc): 110 - 180 m/min (Adjust based on material hardness).
- Feed Rate (f): 0.05 - 0.12 mm/rev.
- Coolant: High-pressure internal coolant is mandatory for 5D depth to clear chips effectively.
Material Excellence & Slot Design
Constructed from high-strength alloy steel with specialized anti-vibration heat treatment, the BEYOND U-drill offers extreme durability. The wide spiral flute geometry is designed for "forced" chip removal, preventing chip-packing—the primary cause of tool failure in 21mm deep hole drilling. The nickel-plated surface provides excellent corrosion resistance and enhanced tool life for this WC04 insert holder.
WC Series U-Drill: Pros & Cons
- Uses WCMX / WCMT inserts with 4 cutting edges (Cost-effective).
- Better stability on uneven or curved surfaces.
- Superior chip breaking on carbon and alloy steels.
- Higher torque requirements than SP series drills.
- Requires precise spindle alignment for deep 5D holes.
Pro-Tip: Choosing Drill Depth (2D to 5D)
The L/D ratio determines stability and application range in CNC tooling:
- 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. It allows for 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.