BEYOND SP C32-5D-SD35.5-SP11 Indexable U-Drill | 35.5mm CNC Deep Hole Drill Body
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BEYOND SP C32-5D-SD35.5-SP11
35.5mm 5D Indexable U-Drill | Professional CNC Deep Hole Boring Body
High-Efficiency 35.5mm Deep Hole Drilling
The BEYOND SP C32-5D-SD35.5-SP11 is a high-performance indexable insert drill engineered for large-diameter metal removal. With its 35.5mm cutting diameter and a powerful 5D depth ratio, this fast hole U-drill is the ultimate solution for deep hole boring in industrial CNC applications. Utilizing internal cooling technology, it maintains stability during high-speed drilling in carbon steel, alloy, and stainless steel.
Technical Specification Guide
Technical Data & Metric/Imperial Conversion
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 35.5 mm | 1.397" |
| Shank Diameter (C) | 32.0 mm | 1.259" |
| Max Drilling Depth (5D) | 177.5 mm | 6.988" |
| Compatible Grade | SPMG110408 | SPMG 432 |
20CrMnTi Alloy & Advanced Spiral Flute Design
Industrial-Grade Body Material: This indexable drill body is forged from 20CrMnTi high-strength alloy steel. The surface is vacuum-quenched to achieve HRC 50-55, providing immense wear resistance. Its flexible core prevents fracture during long-reach boring up to 177.5mm.
Optimized U-Groove Spiral Flute: The spiral flute geometry is designed with extra-large chip slots. This ensures that even at 5D depths, chips are effectively flushed out by the internal cooling holes, preventing chip packing and extending the life of your carbide inserts.
Recommended Cutting Parameters (5D 35.5mm)
Optimize your CNC machining with these baseline settings:
- Cutting Speed (Vc): 110 - 160 m/min (Carbon Steel).
- Feed Rate (f): 0.08 - 0.15 mm/rev.
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 35.5}$$
- 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 (most cost-effective).
- Superior hole verticality and accuracy in deep hole boring.
- Greater body rigidity allows for higher axial force.
- Higher power consumption compared to WC drills.
- Absolute reliance on internal coolant for chip flushing.
Verified Customer Feedback
"Straight as an arrow"
"Drilling 35.5mm in 4140 steel. Even at 170mm depth, there's no deviation. Highly rigid body."
- Robert H. (USA)"Top Tier Chip Flow"
"The spiral flutes are wide and polished. Combined with high-pressure coolant, it's a beast."
- Klaus W. (Germany)"Smooth operation"
- Hiroshi T. (Japan)
"Great quality BEYOND drill"
- Luca B. (Italy)
"Best value 5D drill"
- Pierre G. (France)
Technical Support Q&A
Q: What is the benefit of the Side-Lock (C32) shank?
A: It prevents the tool from rotating in the holder under high-torque drilling, ensuring maximum safety.
Q: Is a pilot hole required?
A: For 5D depths, we recommend starting with a 1D or 2D short U-drill to ensure the 5D tool enters perfectly straight.
Q: Does this include the inserts?
A: No, this is the tool body only. Compatible SPMG11 inserts are sold separately in our shop.
Technical Tip: SP vs. WC U-Drills
SP Series (Square): The professional choice for Blind Hole (Blind Bores). The square insert geometry provides a flatter bottom and superior rigidity for deep 5D holes.
WC Series (Trigon): Primarily used for Through Hole applications. WC inserts offer 6 edges (3 per side) but the body is less rigid for extreme depth-to-diameter ratios compared to the SP series.
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.