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.
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.