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.
Need Help With BEYOND Inserts?
Looking for a BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.