BEYOND WC25-5D-SD20.5-WC03 U-Drill | 20.5mm Indexable Drill (5D Depth)
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BEYOND WC25-5D-SD20.5-WC03
High-Performance 5D Indexable U-Drill | Deep Hole CNC Machining Specialist
Advanced 20.5mm CNC Drilling Solution
The BEYOND WC25-5D-SD20.5-WC03 is a professional-grade indexable insert drill engineered for high-efficiency metal removal. With a 20.5mm 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 Comparison
| Feature | Metric (mm) | Imperial (Inch Equivalent) |
|---|---|---|
| Cutting Diameter (SD) | 20.5 mm | 0.807" |
| Shank Diameter | 25.0 mm | 0.984" |
| Drilling Depth (5D) | 102.5 mm | 4.035" |
Recommended Cutting Parameters
Achieve optimal results for your 20.5mm indexable drill bit with these settings:
- Cutting Speed (Vc): 100 - 180 m/min (Adjust based on material type).
- Feed Rate (f): 0.05 - 0.12 mm/rev.
- Coolant Strategy: High-pressure internal coolant is mandatory for 5D depth to clear chips effectively and prevent tool failure.
Material Excellence & Spiral Flute Geometry
Constructed from high-strength alloy steel with specialized anti-vibration heat treatment, the BEYOND U-drill offers extreme durability. The spiral flute geometry is wide-designed for "forced" chip removal, which prevents chip-packing—the primary cause of tool failure in 20.5mm deep hole drilling. This WC03 insert holder is nickel-plated for superior corrosion resistance and enhanced tool life.
WC Series U-Drill: Pros & Cons
- Uses WCMX / WCMT inserts with 4 cutting edges (Cost-effective).
- Better stability on uneven or curved entry surfaces compared to SP drills.
- Superior chip breaking performance on carbon and alloy steels.
- Higher torque requirements than SP series drills.
- Requires precise 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 tooling:
- 2D/3D: Maximum rigidity. Best for high-speed shallow holes and maximum feed.
- 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.