BEYOND SP C40-5D-SD44-SP14 Indexable U-Drill | 44mm Large Diameter CNC Deep Hole Drill
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BEYOND SP C40-5D-SD44-SP14
Industrial 44mm 5D Deep Hole U-Drill | Professional CNC Indexable Boring Body
High-Efficiency 44mm Deep Hole Machining
The BEYOND SP C40-5D-SD44-SP14 is an industrial-grade indexable insert drill engineered for large-diameter, high-volume material removal. Featuring a 44mm cutting diameter and a massive 5D depth ratio, this fast hole U-drill is the ultimate solution for deep hole boring in heavy workpieces. Designed for CNC lathe metal boring, it utilizes optimized internal cooling to handle extreme thermal loads during high-speed drilling in carbon steel, alloy, and stainless steel.
Technical Model Identification Guide
Technical Data & Metric/Imperial Conversion
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 44.0 mm | 1.732" |
| Shank Diameter | 40.0 mm | 1.574" |
| Max Drilling Depth (5D) | 220.0 mm | 8.661" |
| Product Model | SP C40-5D-SD44 | SP1.57-5D-SD1.73 |
High-Rigidity 20CrMnTi Alloy & Advanced Spiral Flute
Industrial-Grade Body Material: Deep hole drilling with a 44mm diameter generates massive centrifugal forces and torque. This indexable drill body is forged from 20CrMnTi high-strength alloy steel. The body undergoes vacuum quenching to ensure high surface hardness with a shock-resistant core, maintaining long-reach boring stability up to 220mm.
U-Groove Spiral Flute: The spiral flute geometry is specifically enlarged to handle the high volume of chips produced by a 44mm head. Integrated with pressurized internal cooling holes, it ensures chips are evacuated instantly from the hole bottom, preventing tool vibration and re-cutting of chips.
Recommended Cutting Parameters (5D 44mm)
Optimized settings for stable CNC performance:
- Cutting Speed (Vc): 80 - 155 m/min (depending on material hardness).
- Feed Rate (f): 0.08 - 0.14 mm/rev.
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 44}$$
- Requirement: Continuous high-pressure internal cooling is mandatory.
SP Type U-Drill: Advantages & Considerations
- Uses SPMG square inserts with 4 cutting edges (economical and stable).
- Exceptional hole verticality in deep 5D operations.
- Increased tool core thickness compared to WC drills.
- Requires higher spindle torque; ensure machine capacity.
- Massive chip evacuation requires stable coolant pressure.
Verified Customer Feedback
"Massive Steel Plate Performance"
"Used this for 44mm holes in 45# steel. Stability is excellent. BEYOND is our go-to now."
- Robert T. (USA)"Great Deep Reach"
"Equivalent to premium brands but much better price. The 5D depth keeps its center well."
- Klaus H. (Germany)"Fast Shipping & Quality"
"Coolant holes work perfectly. Chips clear out very fast."
- S. Hirota (Japan)"Sturdy and precise"
- Marco D. (Italy)
"Highly recommended"
- Jean P. (France)
Technical Support Q&A
Q: What shank style does this use?
A: It uses a C40 Side-Lock (Weldon) shank, which is standard for preventing tool rotation in high-torque 44mm applications.
Q: Is a pilot hole required?
A: For a 5D drill of this size, starting with a 1D or 2D U-drill for the first 25mm is highly recommended to ensure maximum accuracy.
Q: Can I drill into an angled surface?
A: Yes, the SP square insert geometry handles angled entries better than WC, but you must reduce the feed rate by 50% during entry.
Technical Tip: WC vs. SP U-Drills
WC Series (Trigon): Ideal for general purpose drilling and lower spindle power machines. Lower cost per edge but less rigid.
SP Series (Square): The heavy-duty choice for Deep Hole (5D) applications. The 4-edge square insert provides superior core strength, resulting in straighter holes and higher surface finish in demanding CNC boring tasks.
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.