BEYOND SP C32-5D-SD35-SP11 Indexable U-Drill | 35mm CNC Deep Hole Drill Body
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BEYOND SP C32-5D-SD35-SP11
35mm 5D Indexable U-Drill | Professional CNC Deep Hole Boring Body
High-Efficiency 35mm Deep Hole Specialist
The BEYOND SP C32-5D-SD35-SP11 is a high-performance indexable insert drill designed for professional metal removal. Featuring a 35mm cutting diameter and a powerful 5D depth ratio, this fast hole U-drill excels in deep hole boring for tough alloys and structural steels. Engineered for CNC lathe metal boring, its optimized internal cooling system ensures superior chip evacuation and thermal stability during high-speed drilling.
Model Code Specification
Technical Data & Metric/Imperial Conversion
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 35.0 mm | 1.378" |
| Shank Diameter (C) | 32.0 mm | 1.259" |
| Max Drilling Depth (5D) | 175.0 mm | 6.889" |
| Imperial Model Ref. | SP-C32-5D-D35 | SP-1.25-5D-1.378 |
Premium 20CrMnTi Alloy & High-Volume Spiral Flute
Superior Tool Body: Manufactured from high-quality 20CrMnTi alloy steel, this U-drill body undergoes vacuum quenching to ensure HRC 50-55 surface hardness. This prevents deformation during large diameter boring while providing the core toughness needed for intermittent cuts.
Efficient Chip Evacuation: The spiral flute (U-groove) is designed with an enlarged space for smooth chip flow. Combined with dual internal coolant channels, it effectively flushes metal chips out of the 175mm deep hole, reducing friction and extending the life of your carbide inserts.
Recommended Cutting Parameters (5D 35mm)
Standard values for Carbon Steel (HB180-220). Always use internal coolant:
- Cutting Speed (Vc): 110 - 160 m/min
- Feed Rate (f): 0.08 - 0.15 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 35}$$
- Coolant Pressure: Minimum 1.5 - 2.0 MPa for 5D depth to avoid chip packing.
SP Series U-Drill: Advantages & Considerations
- Uses 4-edge SPMG square inserts (Highly cost-effective).
- Superior hole straightness and verticality in 5D depths.
- Greater body rigidity compared to WC trigon types.
- Requires higher machine horsepower.
- Requires stable coolant pressure for deep hole chip flushing.
Verified Customer Feedback
"Solid and Reliable"
"Drilling 35mm at 5D depth in structural steel. Stable and straight. BEYOND quality is impressive."
- Robert H. (USA)"Perfect for deep holes"
"The spiral flute is deep enough that chips never jam. Excellent internal cooling."
- Klaus M. (Germany)"Great for CNC lathes"
"Rigidity is key for 5D drilling, and this tool delivers. Will buy again."
- Kenji Y. (Japan)"Smooth finish"
- Marc L. (France)
"Excellent value"
- Liam G. (UK)
Technical Q&A
Q: Can I use this for shallow hole drilling as well?
A: Absolutely. While designed for 5D depth, it is perfectly capable of shallow boring, offering maximum versatility.
Q: Does this include the SPMG11 inserts?
A: No, this is the tool body only. We recommend pairing it with BEYOND SPMG110408 inserts for best results.
Q: Is a pilot hole necessary for 35mm 5D?
A: For 5D depths, we recommend starting with a 1D or 2D U-drill to ensure the 5D follows a perfectly straight path.
Technical Tip: WC vs. SP U-Drills
SP Series (Square): The professional choice for Blind Hole (Blind Bores) because the square insert geometry creates a flatter hole bottom. Excellent for Deep Hole (5D) drilling due to superior core rigidity.
WC Series (Trigon): Primarily used for Through Hole applications. WC inserts offer more cutting edges but the body core is thinner, making it slightly less rigid than SP for extreme depths.
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.