BEYOND SP C32-5D-SD37.5-SP11 Indexable U-Drill | 37.5mm CNC Deep Hole Drill Body
Price shown is a starting point. Contact us for a precise quote based on your requirements.
BEYOND SP C32-5D-SD37.5-SP11
Precision 37.5mm 5D Deep Hole U-Drill | High-Stability CNC Indexable Boring Body
Industrial-Grade 37.5mm Deep Hole Specialist
The BEYOND SP C32-5D-SD37.5-SP11 is a professional indexable insert drill engineered for extreme stability and high-efficiency material removal. With a 37.5mm cutting diameter and a massive 5D depth ratio, this fast hole U-drill is the ultimate solution for deep hole boring on CNC lathes and machining centers. Its internal cooling system ensures superior chip evacuation and thermal control during high-speed drilling in carbon steel, alloy, and stainless steel.
What Does the Model Code Mean?
Technical Data & Size Conversion
| Specification | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 37.5 mm | 1.476" |
| Shank Diameter (C) | 32.0 mm | 1.259" |
| Max Drilling Depth (5D) | 187.5 mm | 7.381" |
| Shank Type | Side-Lock (Weldon) | Standard CNC |
Material Science & Chip Removal Design
20CrMnTi Alloy Construction: This indexable drill body is crafted from premium 20CrMnTi alloy steel. It undergoes vacuum quenching to achieve a surface hardness of HRC 50-55, providing incredible wear resistance while the core remains tough to absorb vibration during shallow hole drilling and deep penetrations.
High-Volume Spiral Flute (U-Groove): The spiral flute geometry is precision-engineered to provide maximum chip clearance. For a 37.5mm diameter at 187.5mm depth, efficient chip evacuation is critical; our polished flute design, combined with dual internal coolant holes, ensures chips are flushed out instantly, preventing tool breakage.
Recommended Cutting Parameters
Baseline settings for 45# Steel (HB180-220). Adjust based on your machine's rigidity:
- Cutting Speed (Vc): 100 - 160 m/min
- Feed Rate (f): 0.08 - 0.15 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 37.5}$$
- Coolant Pressure: Minimum 1.5 MPa internal cooling required.
SP Series U-Drill: Pros and Cons
- Uses SPMG square inserts with 4 usable cutting edges (Highly economical).
- Superior straightness and verticality in deep 5D holes.
- Thicker tool core provides higher rigidity than WC drills.
- Higher cutting torque requires more spindle horsepower.
- Not ideal for low-pressure coolant systems.
Verified Customer Feedback
"Deep Hole Specialist"
"I was worried about 5D depth at 37.5mm, but this body is incredibly rigid. Perfectly straight bores in 4140 steel."
- Mike T. (USA)
"Excellent Evacuation"
"The internal cooling holes work perfectly. Chips come out like a fountain. No packing issues."
- Jurgen R. (Germany)
"Robust tool body, fits SPMG11 inserts with zero gaps."
- Kenji A. (Japan)
"Best price for 5D reach. Faster than HSS drills by 10x."
- Ahmed S. (UAE)
"Solid 20CrMnTi steel. Very durable."
- Lucas M. (Brazil)
Frequently Asked Questions
Q: Can I use this on a manual lathe?
A: Not recommended. U-drills require high rigidity and continuous high-pressure internal cooling, which manual lathes often lack.
Q: What is the benefit of the Side-Lock (Weldon) shank?
A: It provides the massive clamping surface needed to prevent the tool from spinning in the holder during high-torque 37.5mm cuts.
Q: Is a pilot hole necessary?
A: For 5D drilling, we recommend starting with a short 2D U-drill for the first 10-20mm to ensure the long tool enters perfectly straight.
Quick Tip: WC vs. SP U-Drills
WC Series (Trigon): Best for general-purpose and low-power machines. Lower insert price but less rigid for deep holes.
SP Series (Square): The professional choice for Deep Hole (5D) and large diameters. The SPMG square insert offers 4 edges and superior core strength, making it the standard for 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.