BEYOND SP C40-5D-SD50-SP14 Indexable U-Drill | 50mm Large Diameter Deep Hole Drill
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BEYOND SP C40-5D-SD50-SP14
Heavy-Duty 50mm 5D Deep Hole U-Drill | Large Diameter CNC Indexable Drill
Industrial 50mm Deep Hole Machining Solution
The BEYOND SP C40-5D-SD50-SP14 is a massive, high-rigidity indexable insert drill designed for large-scale material removal. With a 50mm cutting diameter and a 5D depth ratio, this fast hole U-drill is built for the most demanding deep hole boring tasks. Engineered for CNC lathe metal boring and heavy machining centers, it features high-pressure internal cooling to handle the extreme heat generated during high-speed drilling in large steel forgings and heavy plates.
Model Code Specification Breakdown
Technical Data & Metric/Imperial Conversion
| Feature | Metric Model (mm) | Imperial Equivalent (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 50.0 mm | 1.968" |
| Shank Diameter | 40.0 mm | 1.574" |
| Max Drilling Depth (5D) | 250.0 mm | 9.842" |
| Product Model | SP C40-5D-SD50 | SP1.57-5D-SD1.97 |
Heavy-Duty 20CrMnTi Alloy Steel & Deep-Hole Flute
Anti-Vibration Construction: Drilling 50mm holes at 5D depth requires extreme tool integrity. This indexable drill body is forged from 20CrMnTi high-tensile alloy steel, vacuum-quenched for high surface hardness. This ensures the tool maintains its centerline during long-reach boring operations.
Optimized Chip Evacuation: The spiral flute geometry is extra-wide to accommodate the massive volume of chips produced by a 50mm head. The U-groove flute is precision-ground and combined with pressurized internal cooling holes to flush chips out of the 250mm deep cavity instantly, preventing chip re-cutting and tool catastrophic failure.
Recommended Cutting Parameters (50mm 5D)
Baseline settings for large diameter deep hole drilling:
- Cutting Speed (Vc): 80 - 150 m/min (Depending on material).
- Feed Rate (f): 0.08 - 0.15 mm/rev.
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 50}$$
- Coolant: High-volume, high-pressure internal cooling is critical.
SP Type U-Drill: Advantages & Considerations
- Uses SPMG square inserts with 4 cutting edges (maximum tool life).
- Superior hole verticality; essential for 250mm deep holes.
- Better surface wall finish compared to WC types.
- High torque requirement; requires a high-power machine spindle.
- Requires massive coolant flow to clear 50mm chips.
Verified Customer Feedback
"Beast of a tool"
"Drilling 50mm holes in large steel blocks. The rigidity is impressive for a 5D tool."
- Robert G. (USA)"Straight and Precise"
"Needed deep holes for hydraulic manifolds. The SP type keeps the hole straight even at 250mm deep."
- Klaus W. (Germany)"Professional Grade"
"The finish is excellent. BEYOND tool bodies are the best value on the market right now."
- Hiroshi O. (Japan)"Huge time saver"
- Marco P. (Italy)
"Sturdy construction"
- Pierre L. (France)
Heavy-Duty Drilling Q&A
Q: Does this 50mm drill require a pilot hole?
A: For a 5D drill of this size, starting with a 1D or 2D U-drill for the first 20-30mm is highly recommended to ensure perfect entry and verticality.
Q: Can I use this on a manual lathe?
A: No. Due to the torque and coolant requirements, this tool is strictly for CNC machines with high-pressure internal coolant capability.
Q: What is the benefit of the C40 shank?
A: The C40 (40mm) side-lock shank provides a massive clamping surface, essential for preventing tool spin under high-load 50mm drilling.
Large Diameter Tip: 2D vs. 5D Depth
2D U-Drills: Maximum stability for heavy roughing in shallow holes.
5D U-Drills: Designed for reach. When drilling at 5D with a 50mm diameter, always monitor spindle load. If vibration occurs, reduce feed rate and ensure your coolant is flushing the chips completely from the bottom.
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.