BEYOND SP C40-5D-SD50-SP14 Indexable U-Drill | 50mm Large Diameter Deep Hole Drill
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BEYOND SP C40-5D-SD50-SP14
Heavy-Duty 50mm 5D Deep Hole U-Drill | Large Diameter CNC Indexable Drill
Industrial 50mm Deep Hole Machining Solution
The BEYOND SP C40-5D-SD50-SP14 is a massive, high-rigidity indexable insert drill designed for large-scale material removal. With a 50mm cutting diameter and a 5D depth ratio, this fast hole U-drill is built for the most demanding deep hole boring tasks. Engineered for CNC lathe metal boring and heavy machining centers, it features high-pressure internal cooling to handle the extreme heat generated during high-speed drilling in large steel forgings and heavy plates.
Model Code Specification Breakdown
Technical Data & Metric/Imperial Conversion
| Feature | Metric Model (mm) | Imperial Equivalent (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 50.0 mm | 1.968" |
| Shank Diameter | 40.0 mm | 1.574" |
| Max Drilling Depth (5D) | 250.0 mm | 9.842" |
| Product Model | SP C40-5D-SD50 | SP1.57-5D-SD1.97 |
Heavy-Duty 20CrMnTi Alloy Steel & Deep-Hole Flute
Anti-Vibration Construction: Drilling 50mm holes at 5D depth requires extreme tool integrity. This indexable drill body is forged from 20CrMnTi high-tensile alloy steel, vacuum-quenched for high surface hardness. This ensures the tool maintains its centerline during long-reach boring operations.
Optimized Chip Evacuation: The spiral flute geometry is extra-wide to accommodate the massive volume of chips produced by a 50mm head. The U-groove flute is precision-ground and combined with pressurized internal cooling holes to flush chips out of the 250mm deep cavity instantly, preventing chip re-cutting and tool catastrophic failure.
Recommended Cutting Parameters (50mm 5D)
Baseline settings for large diameter deep hole drilling:
- Cutting Speed (Vc): 80 - 150 m/min (Depending on material).
- Feed Rate (f): 0.08 - 0.15 mm/rev.
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 50}$$
- Coolant: High-volume, high-pressure internal cooling is critical.
SP Type U-Drill: Advantages & Considerations
- Uses SPMG square inserts with 4 cutting edges (maximum tool life).
- Superior hole verticality; essential for 250mm deep holes.
- Better surface wall finish compared to WC types.
- High torque requirement; requires a high-power machine spindle.
- Requires massive coolant flow to clear 50mm chips.
Verified Customer Feedback
"Beast of a tool"
"Drilling 50mm holes in large steel blocks. The rigidity is impressive for a 5D tool."
- Robert G. (USA)"Straight and Precise"
"Needed deep holes for hydraulic manifolds. The SP type keeps the hole straight even at 250mm deep."
- Klaus W. (Germany)"Professional Grade"
"The finish is excellent. BEYOND tool bodies are the best value on the market right now."
- Hiroshi O. (Japan)"Huge time saver"
- Marco P. (Italy)
"Sturdy construction"
- Pierre L. (France)
Heavy-Duty Drilling Q&A
Q: Does this 50mm drill require a pilot hole?
A: For a 5D drill of this size, starting with a 1D or 2D U-drill for the first 20-30mm is highly recommended to ensure perfect entry and verticality.
Q: Can I use this on a manual lathe?
A: No. Due to the torque and coolant requirements, this tool is strictly for CNC machines with high-pressure internal coolant capability.
Q: What is the benefit of the C40 shank?
A: The C40 (40mm) side-lock shank provides a massive clamping surface, essential for preventing tool spin under high-load 50mm drilling.
Large Diameter Tip: 2D vs. 5D Depth
2D U-Drills: Maximum stability for heavy roughing in shallow holes.
5D U-Drills: Designed for reach. When drilling at 5D with a 50mm diameter, always monitor spindle load. If vibration occurs, reduce feed rate and ensure your coolant is flushing the chips completely from the bottom.
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.