BEYOND SP C40-4D-SD50-SP14 Indexable U-Drill Body | 50mm 4D CNC Large Diameter Drill
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BEYOND SP C40-4D-SD50-SP14
50mm 4D Heavy-Duty U-Drill | Large Diameter Blind Hole Specialist
Industrial 50mm Large Diameter Boring Specialist
The BEYOND SP C40-4D-SD50-SP14 is a massive, high-rigidity indexable insert drill designed for high-torque large diameter drilling. With a 50mm cutting diameter and a 4D depth ratio (200mm reach), this tool is the ultimate choice for blind hole machining in heavy industries. Featuring dual internal cooling channels and an ultra-wide spiral flute, it ensures maximum chip evacuation and structural integrity during intense CNC operations.
Decoding the Model: SP C40-4D-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 (4D) | 200.0 mm | 7.874" |
| Imperial Model Equivalent | SP-C1.50-4D-SD1.968-SP14 | |
20CrMnTi Alloy & Reinforced U-Groove
Industrial Strength Material: This U-drill body is forged from premium 20CrMnTi high-strength alloy steel. Engineered to withstand the extreme centrifugal forces of a 50mm head, it is vacuum-quenched (HRC 52-56) for superior surface wear resistance. The core remains tough to absorb the heavy vibrations associated with large diameter deep hole boring.
Optimized Spiral Flute: The spiral flute is widened to handle the massive volume of chips generated by a 50mm cut. Supported by internal coolant holes, it allows high-volume fluid flow to lubricate the SPMG14 carbide inserts and flush chips efficiently over the full 200mm depth.
Recommended Cutting Parameters (50mm 4D)
Suggested for Carbon Steel/Alloy Steel. Ensure high machine torque:
- Cutting Speed (Vc): 100 - 150 m/min
- Feed Rate (f): 0.10 - 0.22 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 50}$$
- Coolant: High-pressure internal cooling is mandatory. Flow rate is critical for 50mm dia.
Large Diameter SP Series: Advantages & Considerations
- Heavy-duty 4-edge SPMG14 square inserts (Cost-effective bulk metal removal).
- Superior vertical stability for Blind Hole Machining.
- Reinforced body prevents "walking" at the start of the cut.
- Requires high-power CNC spindles (High torque application).
- Not recommended for small, low-rigidity lathes.
Need a heavy-duty holder for the 40mm shank?
SHOP C40 SIDE-LOCK HOLDERSVerified Industry Reviews
"Massive Power"
"Using this for large pump housings. The 50mm SP drill handles the blind holes with ease. Very stable body."
- David B. (USA)
"Solid Construction"
"Excellent alloy steel quality. The chip evacuation at 150mm depth is impressive for such a big diameter."
- Hans M. (Germany)
"Perfect 50mm holes every time. Great tool life."
- Kenzo S. (Japan)
"Heavy duty drill for heavy duty work. Beyond is reliable."
- Ricardo F. (Brazil)
"Best price-to-performance ratio for large indexable drills."
- Liam P. (Australia)
Technical Support Q&A
Q: Can I use this for through holes?
A: Yes, but SP is specifically optimized for blind holes to provide a flat bottom. For exclusive through-hole work, WC is an alternative, but SP offers higher body rigidity at this size.
Q: Which inserts should I use?
A: This body is designed for SPMG140512 carbide inserts. Using the correct radius is vital for chip breaking.
Q: Why the C40 shank?
A: A 40mm shank is required to transfer the high torque needed to drive a 50mm cutting head without slipping or vibrating.
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 4D large diameter depths.
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 heavy-duty large diameter work.
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.