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.