BEYOND WC40-4D-SD55-WC08 U-Drill | 55mm Indexable Insert Drill (4D Depth)
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BEYOND WC40-4D-SD55-WC08
Heavy-Duty 4D Indexable U-Drill | 55mm Large Hole CNC Machining
Industrial-Grade 55mm Indexable Drill
The BEYOND WC40-4D-SD55-WC08 is a robust indexable insert drill engineered for large-diameter hole making. Featuring a 55mm cutting diameter and a 4D depth-to-diameter ratio, this tool is the definitive choice for high-speed internal cooling drilling. It provides exceptional stability and superior chip evacuation in carbon steel, alloy steel, and cast iron during heavy-duty CNC machining.
Model Code Explained
Technical Data & Metric/Imperial Comparison
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 55.0 mm | 2.165" |
| Shank Diameter | 40.0 mm | 1.575" |
| Max Drilling Depth | 220.0 mm | 8.661" |
Recommended Cutting Parameters
Optimize your CNC lathe and milling machine performance:
- Cutting Speed (Vc): 100 - 150 m/min (Depending on material).
- Feed Rate (f): 0.08 - 0.15 mm/rev.
- Coolant Strategy: High-pressure internal coolant is required for a 55mm diameter to flush large chips efficiently.
Advanced Material & Chip Groove Design
Constructed from high-performance alloy steel with specialized anti-vibration quenching, this WC08 insert holder ensures maximum rigidity during high-torque operations. The spiral flute geometry is extra-wide to accommodate the high volume of material removed in 55mm deep hole drilling. This nickel-plated body is designed to minimize friction and prevent chip welding.
WC Series U-Drill: Pros & Cons
- Uses WCMX / WCMT inserts with 4 cutting edges (Cost-effective for large diameters).
- Excellent performance in large-diameter drilling with stable chip breaking.
- Suitable for center-offset drilling on lathes.
- Requires high spindle power and torque.
- Coolant pressure must be maintained for vertical drilling.
Pro-Tip: Depth Selection (2D vs 5D)
The L/D ratio is critical for CNC tool stability:
- 2D/3D: Highest rigidity for fast cycle times on shallow holes.
- 4D (This Model): The sweet spot for heavy-duty drilling, balancing depth and tool deflection.
- 5D: Specialized for deep cavities; requires extremely high coolant pressure and lower feed rates.
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.