BEYOND WC25-4D-SD18-WC03 U-Drill | 18mm Indexable Insert Drill (4D Depth)
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BEYOND WC25-4D-SD18-WC03
Industrial 4D Indexable U-Drill | 18mm Precision CNC Machining
Efficient 18mm Indexable Holemaking
The BEYOND WC25-4D-SD18-WC03 is a high-rigidity indexable insert drill engineered for rapid metal removal. Featuring an 18mm cutting diameter and a 4D depth-to-diameter ratio, this tool is the professional 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 & Metric/Imperial Comparison
| Feature | Metric Model (mm) | Imperial Equivalent (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 18.0 mm | 0.708" |
| Shank Diameter | 25.0 mm | 0.984" |
| Max Drilling Depth (4D) | 72.0 mm | 2.835" |
Recommended Cutting Parameters
Optimize your CNC holemaking with these standard guidelines for 18mm WC U-drills:
- Cutting Speed (Vc): 100 - 180 m/min (Material dependent).
- Feed Rate (f): 0.05 - 0.12 mm/rev.
- Coolant Strategy: High-pressure internal cooling is mandatory for effective chip evacuation and protecting the fast hole drill body.
Premium Material & Optimized Spiral Flute
Constructed from high-performance hardened alloy steel with specialized anti-vibration quenching, this WC03 insert holder ensures maximum rigidity. The large spiral flute geometry is specifically engineered for "forced" chip removal, preventing chip-packing—the primary cause of tool failure in 18mm deep hole drilling. The nickel-plated body minimizes friction and prevents chip welding during high-speed operations.
WC Series U-Drill: Advantages & Considerations
- Uses WCMX / WCMT inserts with 3 usable cutting edges (Cost-efficient).
- Stable performance on uneven entry surfaces compared to SP series.
- Excellent chip breaking on low-carbon and alloy steels.
- Requires higher spindle torque and machine power.
- Surface finish may require a secondary finishing pass for high-precision bores.
Product Q&A
A: It is recommended for CNC lathes or machining centers where high-pressure internal coolant can be supplied.
A: Yes, each 18mm U-drill body includes the correct Torx wrench and insert screws.
Global Customer Trust
"Top Notch Rigidity" - Hans B. (Germany)
The 4D depth is surprisingly stable on my CNC center. Great chip evacuation.
"Best value drill" - Mark T. (USA)
Switched from a name brand to BEYOND. No difference in tool life!
"Smooth chip flow" - Kenji S. (Japan)
The spiral flute design really helps with forced chip removal.
"Highly Recommend" - Liam W. (Australia)
Perfect 18mm hole diameter. Solid nickel-plated body.
"Fast Delivery" - Ricardo P. (Brazil)
Excellent service and the product quality is very professional.
Pro-Tip: Choosing Drill Depth (2D to 5D)
The L/D ratio is critical for CNC tooling success:
- 2D/3D: Maximum rigidity; best for shallow holes and high-feed roughing.
- 4D (This Model): The balanced universal standard for industrial deep-hole machining.
- 5D: Specialized long reach drill. Requires extreme coolant pressure to maintain hole straightness.
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.