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.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.