BEYOND SP C32-5D-SD37.5-SP11 Indexable U-Drill | 37.5mm CNC Deep Hole Drill Body
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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.
Need Help With BEYOND Inserts?
Looking for a BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.