BEYOND WC25-4D-SD20.5-WC03 U-Drill | 20.5mm Indexable Insert Drill (4D Depth)
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BEYOND WC25-4D-SD20.5-WC03
High-Precision 4D Indexable U-Drill | 20.5mm Industrial CNC Tooling
Efficient 20.5mm Indexable Holemaking
The BEYOND WC25-4D-SD20.5-WC03 is a high-rigidity indexable insert drill engineered for rapid metal removal. Featuring a 20.5mm cutting diameter and a 4D depth-to-diameter ratio, this tool is the professional choice for high-speed internal cooling drilling. It is optimized for heavy-duty CNC machining in carbon steel, alloy steel, and stainless steel, providing superior chip evacuation and surface finish.
Model Code Specification
Technical Data & Metric/Imperial Comparison
| Feature | Metric Model (mm) | Imperial Equivalent (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 20.5 mm | 0.807" |
| Shank Diameter | 25.0 mm | 0.984" |
| Max Drilling Depth (4D) | 82.0 mm | 3.228" |
Recommended Cutting Parameters
Ensure peak CNC holemaking performance with these recommended settings:
- Cutting Speed (Vc): 100 - 180 m/min (Material dependent).
- Feed Rate (f): 0.05 - 0.12 mm/rev.
- Coolant Requirements: High-pressure internal cooling is required for deep-hole chip removal.
Premium Material & Optimized Spiral Flute
Constructed from high-performance alloy steel with specialized vacuum quenching, this WC03 insert holder ensures maximum toughness. The optimized spiral flute geometry is designed for efficient long-chip breaking, preventing the clogging often seen in 20.5mm fast drilling. The nickel-plated surface prevents corrosion and ensures smooth chip flow.
WC Series U-Drill: Pros & Cons
- Trigon WCMX / WCMT inserts provide 3 cutting edges (Economic).
- Stable drilling even on sloped entry surfaces.
- Lower cutting resistance compared to SP series.
- Requires high-pressure coolant for best results.
- Tolerance is roughly +0.1/+0.2mm; not for ultra-precision H7 bores.
Verified Customer Feedback
"Great rigidity for 20.5mm holes. The 4D length is perfect for our valve blocks."
- Marcus L., Germany ⭐⭐⭐⭐⭐
"Very fast shipping to Sydney. Tool body is high quality steel."
- John D., Australia ⭐⭐⭐⭐⭐
"Perfect performance on our CNC Lathe. Using WCMX03 inserts."
- Kenji Y., Japan ⭐⭐⭐⭐⭐
"Price is very competitive compared to local suppliers. Good tool life."
- Robert P., USA ⭐⭐⭐⭐⭐
"Excellent chip flow. No vibration at high speeds."
- Luca F., Italy ⭐⭐⭐⭐⭐
Product Q&A
Q: Does this include the WCMT03 carbide inserts?
A: No, this is the 20.5mm U-drill body only. Inserts must be purchased separately.
Q: What is the recommended coolant pressure?
A: For a 4D depth, we recommend at least 1.5 - 2.0 MPa for reliable chip evacuation.
Q: Can I use this for blind holes?
A: Yes, it is ideal for blind holes as it creates a relatively flat bottom.
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 deep 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.