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.
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.