BEYOND SP C40-3D-SD50-SP14 Indexable U-Drill Body | 50mm 3D CNC Boring Drill
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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.
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.