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.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.