BEYOND WC20-4D-SD15.5-WC03 U-Drill | 15.5mm Indexable Insert Drill Body (4D Depth)
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BEYOND WC20-4D-SD15.5-WC03
Precision 4D Indexable U-Drill | 15.5mm Industrial CNC Tooling
High-Speed 15.5mm Indexable Holemaking
The BEYOND WC20-4D-SD15.5-WC03 is a high-rigidity indexable insert drill engineered for rapid metal removal. As a specialized fast hole U-drill, it features a 15.5mm cutting diameter with a 4D depth ratio, making it the definitive choice for high-speed internal cooling drilling. Optimized for heavy-duty CNC machining, it provides exceptional stability in carbon steel, alloy steel, and stainless steel.
Model Code Specification
Technical Data & Units Comparison
| Feature | Metric Model (mm) | Imperial Equivalent (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 15.5 mm | 0.610" |
| Shank Diameter | 20.0 mm | 0.787" |
| Drilling Depth (4D) | 62.0 mm | 2.441" |
Recommended Cutting Parameters
Maximize your CNC metal boring performance with these baseline settings:
- Cutting Speed (Vc): 100 - 180 m/min (Material dependent).
- Feed Rate (f): 0.05 - 0.12 mm/rev.
- Formula: Spindle Speed $N = \frac{Vc \times 1000}{\pi \times D}$
- Coolant: High-pressure internal cooling is mandatory for chip flushing.
Premium Material & Optimized Spiral Flute
Constructed from high-performance quenched alloy steel, this WC03 insert holder ensures maximum toughness. The optimized spiral flute geometry is designed for efficient long-chip breaking and "forced" evacuation, preventing clogging during 15.5mm fast drilling. The nickel-plated surface prevents corrosion and ensures smooth chip flow in high-heat environments.
WC Series U-Drill: Pros & Cons
- Uses WCMX / WCMT inserts with 3 cutting edges (Economic choice).
- Stable drilling on uneven or sloped entry surfaces.
- Lower cutting resistance compared to SP series.
- Requires high-pressure coolant for 4D depths.
- Tolerance is roughly +0.1/+0.2mm; not for H7 bores.
Verified Customer Feedback
"Great rigidity for 15.5mm holes. The 4D length is perfect for our hydraulic blocks."
- Marcus L., Germany ⭐⭐⭐⭐⭐
"Fast shipping to the UK. Tool body is high quality steel and fits WC03 perfectly."
- David H., United Kingdom ⭐⭐⭐⭐⭐
"Excellent price-performance ratio. Much better than our local supplier."
- Kenji Y., Japan ⭐⭐⭐⭐⭐
"Internal cooling works like a charm. No heat buildup in stainless 304."
- Robert P., USA ⭐⭐⭐⭐⭐
"Strong body and perfect nickel plating. Highly recommend BEYOND."
- Luca F., Italy ⭐⭐⭐⭐⭐
Frequently Asked Questions
Q: Does this include the WCMT03 carbide inserts?
A: No, this is the 15.5mm U-drill body only. Inserts must be purchased separately.
Q: What is the benefit of the WC series over the SP series?
A: WC series (Trigon) offer 3 cutting edges and generally have lower cutting resistance, making them better for general-purpose CNC machining.
Q: Can I use this for blind holes?
A: Yes, it is ideal for blind holes as it creates a relatively flat bottom compared to a standard drill.
Pro-Tip: Choosing the Right Depth (2D vs 4D vs 5D)
- 2D/3D: Best for shallow holes; offers maximum rigidity and highest feed rates.
- 4D (This Model): The industrial sweet spot. Versatile for most deep-hole CNC machining needs.
- 5D: Specialized long reach drilling. Requires extreme coolant pressure to maintain hole straightness.
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.