BEYOND SP C32-5D-SD27-SP07 Indexable U-Drill | 27mm 5D CNC Deep Hole Drill Body
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BEYOND SP C32-5D-SD27-SP07
27mm 5D Indexable U-Drill | Professional Blind Hole CNC Boring Body
Precision 27mm Deep Hole Machining
The BEYOND SP C32-5D-SD27-SP07 is a high-rigidity indexable insert drill engineered for extreme stability in deep hole boring. With a 27mm cutting diameter and a 5D depth ratio, this tool is the industry choice for blind hole machining. Featuring internal cooling and a specialized spiral flute, it ensures high-speed efficiency and superior surface finish on CNC lathes.
What Does the Model Code Mean?
Metric & Imperial Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 27.0 mm | 1.063" |
| Shank Diameter (C) | 32.0 mm | 1.259" |
| Drilling Depth (5D) | 135.0 mm | 5.315" |
| Imperial Ref. Model | SP-C1.25-5D-SD1.063-SP07 | |
20CrMnTi Alloy & High-Efficiency Spiral Flute
Superior Tool 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 incredible wear resistance while the core remains shock-resistant to withstand interrupted cuts during deep hole boring.
Optimized Spiral Flute (U-Groove): The spiral flute geometry is designed with extra-large chip slots. Paired with dual internal cooling holes, it allows high-pressure coolant to flush metal chips out of 135mm deep bores instantly, preventing chip packing and protecting the carbide inserts from heat failure.
Recommended Cutting Parameters (5D 27mm)
Suggested for Carbon Steel (HB < 250). Adjust based on machine rigidity:
- Cutting Speed (Vc): 120 - 175 m/min
- Feed Rate (f): 0.06 - 0.12 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 27}$$
- Coolant: High-pressure internal cooling (Min 1.5 MPa) is mandatory for 5D.
SP Series U-Drill: Advantages & Considerations
- Uses 4-edge SPMG square inserts (Cost-effective).
- Exceptional stability for Blind Hole Machining.
- High core thickness ensures minimal deflection at 135mm reach.
- Higher power requirement compared to standard twist drills.
- Sensitive to unstable coolant pressure.
Global Customer Feedback
"Solid Blind Boring"
"Switched from WC to this SP drill for blind bores. Bottom finish is much flatter and stable at 5D depth."
- Robert H. (USA)"Highly Rigid"
"20CrMnTi steel is very tough. Zero vibration in 4140 steel."
- Klaus W. (Germany)"Great for the price"
- Hiroshi T. (Japan)
"Accurate deep holes"
- Marc L. (France)
"Fast chip flow"
- Liam G. (UK)
Technical Q&A
Q: Why is SP better for blind holes?
A: SP square inserts provide a flatter hole bottom profile and higher body rigidity compared to WC trigon models.
Q: What is the benefit of the Side-Lock shank?
A: The C32 (32mm) straight shank with a flat allows for massive clamping force, preventing the tool from rotating under high torque.
Q: Can I use this for shallow hole drilling?
A: Yes, while rated for 5D, it works perfectly for 2D or 3D depths as well.
Machinist Tip: SP vs. WC U-Drills
SP Series (Square): The professional choice for Blind Hole (Blind Bores). Square inserts create a flatter bottom and offer maximum core strength for 5D depths.
WC Series (Trigon): Primarily used for Through Hole applications. WC inserts offer 6 edges but the body core is thinner, making it less rigid than SP for extreme depths.
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.