BEYOND SP C40-3D-SD50-SP14 Indexable U-Drill Body | 50mm 3D CNC Boring Drill
Free shipping on all orders.
Check compatibility: Confirm the model and dimensions before ordering.
Need help choosing? Contact us before ordering.
💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
BEYOND SP C40-3D-SD50-SP14
50mm 3D Heavy-Duty U-Drill | Large Diameter Blind Hole Boring Specialist
Industrial-Grade 50mm Indexable Boring Solution
The BEYOND SP C40-3D-SD50-SP14 is a powerhouse indexable insert drill designed for massive material removal in large diameter boring. With a 50mm cutting diameter and a 3D depth ratio (150mm reach), this tool is the professional choice for blind hole machining. Featuring internal cooling and a precision-engineered spiral flute, it ensures maximum stability and rapid chip evacuation on heavy-duty CNC lathes and machining centers.
Decoding the Model: SP C40-3D-SD50-SP14
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 50.0 mm | 1.968" |
| Shank Diameter (C) | 40.0 mm | 1.575" |
| Max Drilling Depth (3D) | 150.0 mm | 5.905" |
| Equivalent Model | SP-C1.575-3D-SD1.968-SP14 | |
Forged 20CrMnTi Alloy & Advanced Spiral Flute
Industrial-Grade Tool Body: This indexable drill body is manufactured from premium 20CrMnTi alloy steel. Through vacuum quenching and hardening to HRC 52-55, it maintains exceptional rigidity for large diameter boring. The high-rigidity core minimizes vibration even when cutting tough materials like alloy steel and cast iron.
Optimized Chip Pocket Geometry: The spiral flute is widened to handle the massive chip volume produced by 50mm holes. Integrated with central internal cooling holes, high-pressure coolant flushes chips directly out of the 150mm deep bore, preventing the catastrophic chip packing often found in blind hole machining.
Recommended Cutting Parameters (50mm 3D)
Suggested for Carbon Steel (HB < 250). Adjust based on machine power/torque:
- Cutting Speed (Vc): 100 - 150 m/min
- Feed Rate (f): 0.08 - 0.15 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 50}$$
- Coolant: High-pressure internal cooling is mandatory for 50mm diameter deep holes.
Need a heavy-duty side-lock holder for this 40mm shank?
SHOP COMPATIBLE C40 TOOL HOLDERSReal Feedback from Global Customers
"Massive Torque Handling"
"I use this on our heavy CNC lathe for 50mm blind bores. The 40mm shank is solid and the tool body shows zero deflection."
- Robert H. (Germany)
"Clean Finish"
"BEYOND's SP series is my go-to for blind holes. Flat bottom finish is excellent. Fast shipping to Brazil too."
- Pedro S. (Brazil)
"Great quality. The pocket for SPMG14 is precision machined. Very happy."
- Arthur L. (UK)
"Solid 50mm boring. Internal cooling is perfect."
- Marek W. (Poland)
"Fast delivery and well packaged. Industrial grade."
- Y. Watanabe (Japan)
Why Choose the SP Series Indexable Drill?
- Uses 4-edge SPMG square inserts for cost efficiency.
- Optimized for Blind Hole Machining (Creates a flat bore bottom).
- Superior core strength for large diameter 3D deep boring.
- Requires high-torque spindles for 50mm drilling diameter.
- Heavier body requires proper side-lock clamping.
Technical Q&A
Q: What makes SP better for blind holes?
A: The square geometry of the SPMG insert creates a much flatter bottom profile than the Trigon (WC) inserts, making it ideal for valve seats or blind mounting holes.
Q: Are inserts included with the drill body?
A: No, the carbide inserts are sold separately. This body is compatible with the SPMG140512 series.
Q: Can I use this on a CNC Lathe?
A: Yes, it is widely used in CNC lathes. Ensure your machine has enough horsepower to drive a 50mm U-drill at recommended feeds.
Machinist Tip: SP vs. WC U-Drills
SP Series (Square): The professional choice for Blind Hole (Blind Bores). Square inserts create a flatter bottom and offer maximum core strength for large diameter machining.
WC Series (Trigon): Primarily used for Through Hole applications. WC inserts offer more cutting edges but the body core is thinner, making it less rigid than SP for extreme depths.
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.