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.
Need Help With BEYOND Inserts?
Looking for a BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.