BEYOND SP C40-5D-SD39-SP11 Indexable U-Drill | 39mm CNC Deep Hole Drill Body
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BEYOND SP C40-5D-SD39-SP11
Precision 39mm 5D Deep Hole U-Drill | High-Stability CNC Indexable Boring Body
Industrial-Grade 39mm Deep Hole Specialist
The BEYOND SP C40-5D-SD39-SP11 is a professional indexable insert drill designed for high-efficiency material removal. With a 39mm cutting diameter and a powerful 5D depth ratio, this fast hole U-drill is engineered for deep hole boring in tough alloys and structural steels. Its internal cooling system ensures superior chip evacuation and thermal control during continuous high-speed drilling on CNC lathes and machining centers.
Model Identification Guide
Technical Data & Metric/Imperial Conversion
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter | 39.0 mm | 1.535" |
| Shank Diameter | 40.0 mm | 1.574" |
| Max Drilling Depth (5D) | 195.0 mm | 7.677" |
| Compatible Inserts | SPMG110408 | SPMG 432 |
20CrMnTi Alloy & High-Efficiency Spiral Flute
Superior Tool Body Material: This U-drill body is forged from premium 20CrMnTi alloy steel. The body achieves a surface hardness of HRC 50-55 through vacuum quenching, ensuring high durability while maintaining the core toughness required for shallow hole drilling and deep 195mm penetration without breakage.
Optimized Chip Slot: The spiral flute geometry is precision-engineered to provide maximum chip space. Paired with dual internal coolant channels, it effectively flushes chips out of the hole bottom, ensuring a smooth surface finish and preventing chip welding on the carbide inserts.
Recommended Cutting Parameters (39mm 5D)
Baseline settings for standard Carbon Steel. Adjust based on material hardness:
- Cutting Speed (Vc): 100 - 150 m/min
- Feed Rate (f): 0.08 - 0.15 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 39}$$
- Requirement: High-pressure internal cooling (Min 1.5 MPa) is mandatory for 5D depth.
SP Type U-Drill: Advantages & Considerations
- Uses SPMG square inserts with 4 usable cutting edges (high cost-efficiency).
- Exceptional stability and verticality for deep 5D holes.
- Stronger tool core compared to WC drills, reducing deflection.
- Requires higher spindle power for 39mm diameter.
- Coolant volume is critical to flush large chip loads.
Verified Customer Feedback
"Workhorse Tool"
"Drilling 39mm holes in structural steel. Stable and fast. BEYOND quality is top-notch."
- Jonathan R. (USA)"Efficient chip flow"
"The spiral flute works great with high-pressure coolant. No chip packing even at 5D depth."
- Lukas H. (Germany)"Fast Shipping"
"Body is very rigid. Perfect fit for my CNC lathe setup."
- Hiro T. (Japan)"Solid build"
- Alessandro P. (Italy)
"Excellent value"
- Francois L. (France)
Technical Support Q&A
Q: What is the benefit of the Side-Lock (C40) shank?
A: The C40 shank allows for massive clamping force, preventing the tool from rotating in the holder during the high-torque demand of a 39mm cut.
Q: Is a pilot hole required for 5D drilling?
A: For maximum precision in 5D depths, we recommend a short 2D U-drill starter hole (approx. 10-20mm) to guide the 5D tool.
Q: Does this include the inserts?
A: No, this is the tool holder only. You can find our compatible high-performance SPMG11 inserts in the "Inserts" category.
Technical Tip: WC vs. SP U-Drills
WC Series (Trigon): Best for general purpose and low spindle power machines. Lower cost per edge but less rigid.
SP Series (Square): The professional choice for Deep Hole (5D) applications. The 4-edge SPMG square insert provides superior balance and a thicker tool core, resulting in straighter holes and better dimensional tolerance in heavy-duty CNC machining.
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.