BEYOND SP C32-5D-SD37-SP11 Indexable U-Drill | 37mm CNC Deep Hole Drill Body
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BEYOND SP C32-5D-SD37-SP11
Precision 37mm 5D Deep Hole U-Drill | High-Rigidity CNC Indexable Boring Body
Master 37mm Deep Hole CNC Machining
The BEYOND SP C32-5D-SD37-SP11 is a professional-grade indexable insert drill engineered for high-efficiency metal removal. With its 37mm cutting diameter and massive 5D depth-to-diameter ratio, this fast hole U-drill is the ultimate solution for deep hole boring in heavy industrial workpieces. Designed for CNC lathe metal boring, it features optimized internal cooling to handle high thermal loads during high-speed drilling of carbon steel, alloy, and stainless steel.
Technical Model Identification Guide
Technical Data & Metric/Imperial Conversion
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 37.0 mm | 1.457" |
| Shank Diameter (C) | 32.0 mm | 1.259" |
| Max Drilling Depth (5D) | 185.0 mm | 7.283" |
| Compatible Model | SP C32-5D-SD37 | SP1.25-5D-SD1.45 |
Premium 20CrMnTi Alloy & Advanced Spiral Flute
Superior Tool Body Material: This indexable drill body is forged from high-strength 20CrMnTi alloy steel. The body is vacuum-quenched to achieve a surface hardness of HRC 50-55, ensuring high wear resistance while maintaining a flexible core to withstand the intense torque of shallow hole drilling and deep 185mm penetration.
Optimized U-Groove Spiral Flute: The spiral flute geometry is specifically enlarged to ensure smooth chip evacuation for 37mm bores. Integrated with dual internal cooling holes, it allows high-pressure coolant to flush chips instantly, protecting your SPMG11 carbide inserts from heat-related failure.
Recommended Cutting Parameters (5D 37mm)
Optimized settings for stable CNC performance:
- Cutting Speed (Vc): 100 - 160 m/min (depending on material).
- Feed Rate (f): 0.08 - 0.15 mm/rev.
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 37}$$
- 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 stability and verticality in deep 5D operations.
- Stronger tool core compared to WC drills, reducing deflection.
- Requires higher spindle power/torque than WC drills.
- Chip evacuation is critical—ensure high coolant flow.
Verified Customer Feedback
"Solid and Reliable"
"Used for 180mm depth in alloy steel. The straightness is impressive. BEYOND drills are legit."
- Steve L. (USA)"Best Price-Performance"
"Much cheaper than Sandvik but holds up well in production. The finish is decent."
- Jurgen W. (Germany)"Strong Body"
"No vibration even at 5D depth. Internal coolant is a must and works perfectly."
- Yoshi K. (Japan)"Quick delivery, good tool."
- Marc B. (France)
"Highly recommended."
- Paolo T. (Italy)
Technical Support Q&A
Q: What is the benefit of the C32 shank?
A: The 32mm Side-Lock shank is standard for mid-to-large range drills, providing a secure grip in your CNC tool holder to prevent rotation under torque.
Q: Is a pilot hole required for 5D drilling?
A: For maximum precision in 5D depths, we recommend starting with a short 2D U-drill starter hole to guide the long body.
Q: Can I use this for off-center drilling?
A: Yes, U-drills can handle off-center starts on lathes, but ensure your feed rate is reduced during entry.
Technical Tip: WC vs. SP U-Drills
WC Series (Trigon): Best for general-purpose drilling on machines with lower spindle power. Economical but less rigid for deep 5D holes.
SP Series (Square): The professional choice for Deep Hole (5D) and large diameters. The SPMG square insert provides 4 cutting edges and superior core strength, resulting in straighter holes 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.