BEYOND WC20-4D-SD16.5-WC03 U-Drill | 16.5mm Indexable Insert Drill Body (4D Depth)
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BEYOND WC20-4D-SD16.5-WC03
16.5mm 4D Indexable U-Drill | High-Speed CNC Boring Tool
Industrial Precision Indexable Holemaking
The BEYOND WC20-4D-SD16.5-WC03 is a professional-grade high-efficiency indexable insert drill designed for modern CNC machining. As a specialized fast hole U-drill, it features a 16.5mm cutting diameter with a 4D depth ratio. This tool is engineered for internal cooling drilling, ensuring superior chip evacuation in carbon steel, alloy steel, and stainless steel applications.
Model Code Specification
Metric vs. Imperial Comparison
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Cutting Diameter | 16.5 mm | 0.649" |
| Shank Diameter | 20.0 mm | 0.787" |
| Effective Drilling Depth | 66.0 mm | 2.598" |
Material & Flute Geometry Breakdown
Our indexable tool holder is manufactured from high-performance alloy steel with specialized vacuum quenching to ensure a hardness of 45-50 HRC. The spiral flute geometry is designed for "forced" chip evacuation, which prevents chip welding and reduces vibration during 16.5mm deep-hole drilling. The nickel-plated surface finish provides excellent corrosion resistance and smooth chip flow.
Recommended Cutting Parameters
For optimal performance in metal boring, follow these standard guidelines:
- Cutting Speed (Vc): 100 - 160 m/min (Steel/Stainless).
- Feed Rate (f): 0.05 - 0.12 mm/rev.
- Coolant Strategy: High-pressure internal cooling is mandatory for 4D depth to maintain insert life.
- Spindle Speed (N): $N = \frac{Vc \times 1000}{\pi \times D}$
WC Series U-Drill: Pros & Cons
- Uses WCMX / WCMT inserts with 3 usable cutting edges (Highly economical).
- Stable entry on uneven or curved surfaces.
- Lower cutting resistance than standard carbide drills.
- Higher power consumption than twist drills.
- Tolerance is roughly +0.1/+0.2mm (Not for H7 precision).
Verified Customer Feedback
"Excellent Stability" - Hans M. (Germany)
4D length is perfect for our CNC center. Chip removal is flawless.
"High Value" - Mark T. (USA)
Great body rigidity. Switched from a name brand and haven't looked back.
"Highly Recommend" - Sato K. (Japan)
16.5mm diameter is very consistent. Nickel coating looks great.
"Professional Grade" - Liam W. (Australia)
Fast shipping and the tool body is very tough. Used on 304 SS.
"Perfect Fit" - David R. (UK)
The WC03 inserts seat perfectly. No vibration during drilling.
Frequently Asked Questions
Q: Does this include the carbide inserts?
A: No, this is the 16.5mm U-drill body only. It includes the insert screws and the correct Torx wrench.
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 twist drills.
Q: What is the benefit of the WC series over the SP series?
A: WC series (Trigon) offers 3 usable cutting edges per insert, making it more cost-effective for general production.
Pro-Tip: Choosing Drill Depth (2D to 5D)
The L/D ratio is critical for CNC holemaking success:
- 2D/3D: Maximum rigidity; best for shallow holes and high-feed roughing.
- 4D (This Model): The industrial universal standard. Balanced rigidity for deep-hole machining.
- 5D: Specialized long-reach. Requires extreme coolant pressure and perfect alignment.
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.