BEYOND SP C20-5D-SD13.5-SP05 Indexable U-Drill Body | 13.5mm 5D CNC Deep Hole Drill
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BEYOND SP C20-5D-SD13.5-SP05
13.5mm 5D Indexable U-Drill | Precision Blind Hole Boring Specialist
Industrial 13.5mm Deep Hole Boring Specialist
The BEYOND SP C20-5D-SD13.5-SP05 is a high-performance indexable insert drill engineered for extreme stability in deep hole boring. With a 13.5mm cutting diameter and a 5D depth ratio (67.5mm reach), this tool is the primary choice for blind hole machining. Featuring internal cooling and a high-efficiency spiral flute, it ensures rapid chip evacuation and superior surface finish on CNC lathes. This rapid drill is designed for high-feed operations in steel, alloy, and cast iron.
Decoding the Model: SP C20-5D-SD13.5-SP05
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 13.5 mm | 0.531" |
| Shank Diameter (C) | 20.0 mm | 0.787" |
| Max Drilling Depth (5D) | 67.5 mm | 2.657" |
| Equivalent Model | SP-C0.75-5D-SD0.531-SP05 | |
20CrMnTi Alloy & Advanced Spiral Flute Design
Premium Body Material: This U-drill CNC tool body is manufactured from 20CrMnTi alloy steel. Through vacuum quenching and specialized tempering, the body reaches a surface hardness of HRC 50-55. This ensures the indexable drill resists deformation under high-pressure deep hole drilling while maintaining a shock-absorbing core for interrupted cuts.
High-Performance U-Slot: The spiral flute is precision-ground with a wide-opening U-shape. This geometry, coupled with internal coolant holes, prevents chip clogging—a common failure in 5D deep hole boring. By optimizing the chip evacuation path, it significantly extends the life of your carbide inserts.
Recommended Cutting Parameters (13.5mm 5D)
Optimized for Steel (HB < 250). Please adjust based on your CNC machine's rigidity:
- Cutting Speed (Vc): 110 - 160 m/min
- Feed Rate (f): 0.04 - 0.08 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 13.5}$$
- Coolant Requirement: High-pressure internal cooling (Center water) is 100% required for 5D depth.
Beyond SP Series: Advantages & Considerations
- Uses 4-edge SPMG square inserts (Superior cost-efficiency).
- Engineered for Blind Hole Machining with a flatter hole bottom.
- Massive tool core rigidity—ideal for 5D deep hole boring.
- Higher power requirement compared to trigon drills.
- Strict requirement for high-pressure coolant to clear deep chips.
Need a compatible holder for the 20mm shank?
VIEW COMPATIBLE C20 SIDE-LOCK HOLDERSWhat Our Global Clients Say
"Solid Deep Bores"
"I use this for 65mm blind holes in 4140 steel. The SPMG inserts last forever in this body."
- Mark T. (USA)
"German Machine Approved"
"Excellent alloy steel quality. The chip removal is smooth even at max depth."
- Gunter P. (Germany)
"Perfect 13.5mm diameter control. Arrived in Tokyo in 4 days."
- Kenji Y. (Japan)
"Beyond delivers quality again. Great for deep boring."
- Carlos R. (Mexico)
"No deviation in 60mm holes. Very happy."
- Liam W. (UK)
Technical Support Q&A
Q: Why is SP better for blind holes?
A: SP square inserts provide a flatter hole bottom profile and the tool body has a thicker core, providing maximum rigidity at 5D depth.
Q: Is a pilot hole required?
A: For 5D (67.5mm), we recommend starting with a short 2D U-drill starter hole to ensure the tool enters perfectly straight.
Q: What is the benefit of the Side-Lock (C20) shank?
A: The 20mm straight shank allows for massive clamping force in side-lock holders, preventing tool rotation under high torque.
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 more cutting 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.