BEYOND SP C40-4D-SD47-SP14 Indexable U-Drill Body | 47mm 4D CNC Large Hole Drill
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BEYOND SP C40-4D-SD47-SP14
47mm 4D Heavy-Duty U-Drill | Precision Blind Hole Machining Specialist
High-Rigidity 47mm Large Diameter Boring Tool
The BEYOND SP C40-4D-SD47-SP14 is an industrial-grade indexable insert drill engineered for extreme stability in deep hole boring and large-diameter applications. With a 47mm cutting diameter and a 4D depth ratio (188mm reach), this tool is the primary choice for blind hole machining. Featuring internal cooling and a high-efficiency spiral flute, it ensures rapid chip evacuation and superior surface finish on CNC lathes and machining centers.
Decoding the Model: SP C40-4D-SD47-SP14
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 47.0 mm | 1.850" |
| Shank Diameter (C) | 40.0 mm | 1.575" |
| Max Drilling Depth (4D) | 188.0 mm | 7.401" |
| Imperial Equivalent Model | SP-C1.50-4D-SD1.850-SP14 | |
20CrMnTi Alloy & Advanced Spiral U-Groove
Superior Tool Body Material: This indexable drill body is forged from 20CrMnTi high-strength alloy steel. The surface is vacuum-quenched to reach HRC 50-55, providing incredible wear resistance and preventing tool deflection under heavy-load deep hole boring. The shock-resistant core is perfect for handling interrupted cuts in hard materials.
Optimized Spiral Flute: The specialized spiral U-groove geometry features wide chip pockets designed for high-volume material removal. Combined with dual internal cooling holes, it allows high-pressure coolant to flush metal chips out of 188mm deep bores instantly, preventing chip packing and protecting the carbide inserts from heat failure.
Recommended Cutting Parameters (47mm 4D)
Suggested for Carbon Steel (HB < 250). Adjust based on machine rigidity:
- Cutting Speed (Vc): 100 - 150 m/min
- Feed Rate (f): 0.10 - 0.20 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 47}$$
- Coolant: High-pressure internal cooling (Center water) is mandatory for 4D reach.
Required a Side-Lock Tool Holder for the 40mm shank?
SHOP COMPATIBLE C40 TOOL HOLDERSVerified Customer Reviews
"Incredible Rigidity"
"I was worried about a 47mm drill at 4D, but the BEYOND body is rock solid. No wandering or vibration in 4140 steel."
- Mike T. (USA)
"Efficient Chip Removal"
"Internal cooling is excellent. Even at full depth, the spiral flutes keep the workspace clean."
- Pierre D. (France)
"High quality alloy steel. Arrived in perfect condition in Brazil."
- Ricardo S. (Brazil)
"Perfect for blind holes. The bottom is much flatter than my old WC drill."
- Ahmed M. (UAE)
"Best value for large diameter drilling. Highly recommend for CNC shops."
- Thomas G. (Germany)
SP Series Indexable Drill: Advantages & Considerations
- Uses 4-edge SPMG square inserts for maximum economy.
- Optimized for Blind Hole Machining (Flatter hole bottom).
- Reinforced tool body core for superior 4D depth rigidity.
- Higher power/torque requirement for large 47mm diameter.
- Requires high-pressure coolant pump for 4D depth.
Technical Support Q&A
Q: Why is SP better for blind holes?
A: SP square inserts create a significantly flatter hole bottom and the tool body core is thicker, providing the rigidity needed for deep holes.
Q: Does this work on a standard CNC lathe?
A: Yes, as long as you have a 40mm side-lock holder and sufficient spindle torque to drive a 47mm head.
Q: What is the benefit of the 20CrMnTi material?
A: It provides a hard wear-resistant surface to withstand chip friction while maintaining a tough core to absorb machining impact.
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-5D depths.
WC Series (Trigon): Primarily used for Through Hole applications. WC inserts offer more cutting edges but the body core is thinner, making it slightly less rigid than SP for extreme depths.
Need Help With BEYOND Inserts?
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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.