BEYOND SP C20-4D-SD17-SP06 Indexable U-Drill Body | 17mm 4D CNC Deep Hole Drill
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BEYOND SP C20-4D-SD17-SP06
17mm 4D High-Performance U-Drill | Precision Blind Hole Specialist
Industrial-Grade 17mm Deep Hole Boring
The BEYOND SP C20-4D-SD17-SP06 is an indexable insert drill specifically engineered for high-stability deep hole boring. With a 17mm cutting diameter and a 4D depth ratio (68mm reach), it excels in blind hole machining where standard drills fail. Equipped with internal cooling and a high-efficiency spiral flute, it is the ultimate tool for modern CNC machining centers.
Model Breakdown: SP C20-4D-SD17-SP06
Technical Specifications: Metric vs. Imperial
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 17.0 mm | 0.669" |
| Shank Diameter (C) | 20.0 mm | 0.787" |
| Drilling Depth (4D) | 68.0 mm | 2.677" |
| ISO Designation | SP-C0.787-4D-SD0.669-SP06 | |
Advanced Material & Chip Management
Industrial Grade 20CrMnTi: This indexable drill is crafted from premium 20CrMnTi alloy steel. The surface undergoes a specialized quenching process to achieve high core toughness and a surface hardness of HRC 52-55. This ensures the drill body maintains its integrity under high-torque large diameter drilling operations.
Precision Spiral Flute (U-Slot): The engineered U-slot spiral flute facilitates smooth, continuous chip evacuation. Paired with dual internal cooling holes, it allows high-pressure coolant to directly reach the cutting edge, effectively preventing chip accumulation during blind hole machining.
Recommended Cutting Parameters (17mm 4D)
Optimized for Carbon Steel and Alloy Steel. Please adjust based on your CNC setup:
- Cutting Speed (Vc): 110 - 170 m/min
- Feed Rate (f): 0.05 - 0.12 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 17}$$
- Coolant Tip: Always use internal cooling for 4D depths to maximize tool life.
Need a heavy-duty side-lock holder for this 20mm shank?
VIEW COMPATIBLE C20 TOOL HOLDERSGlobal Professional Feedback
"Best for Blind Holes"
"Switched to the SP series for our manifold production. The flat bottom hole it leaves is perfect for our specs. Excellent rigidity."
- Robert H. (Germany)
"Reliable Performance"
"17mm size is accurate. We run these on Geely auto parts production lines. Very durable body."
- Chen L. (China)
"Solid 4D drill. Chips clear out easily even without high-end pumps."
- Kevin T. (USA)
"Fast shipping to the UK. BEYOND is our go-to for CNC tooling."
- James M. (UK)
"Precision is top-notch. Fits our SPMG06 inserts perfectly every time."
- Sato K. (Japan)
SP Series: Why Choose Square Inserts?
- Uses SPMG square inserts with 4 usable cutting edges.
- Optimized for Blind Hole Boring (Nearly flat bottom).
- Thicker tool core provides superior rigidity at 4D depths.
- Higher power consumption due to square insert geometry.
- Performance heavily reliant on consistent internal coolant flow.
Technical Q&A
Q: Can I use this for through holes?
A: Yes, but the SP series is optimized for blind holes. For dedicated through-hole tasks, the WC series is often more economical due to the 6-edge insert design.
Q: What happens if I don't use internal cooling?
A: For a 4D depth, internal cooling is critical. Without it, chips will pack in the flute, leading to rapid tool wear or body breakage.
Q: Is the 20mm shank compatible with standard collets?
A: Yes, it fits standard C20 side-lock holders or ER32 collets with a 20mm sleeve.
Pro Tip: SP vs. WC U-Drill Selection
SP Series (Square): Choose this for Blind Hole applications. Square inserts provide a flatter profile and the body is significantly more rigid for 4D and 5D depths.
WC Series (Trigon): Ideal for Through Holes. It features lower cutting resistance and more economical inserts, but has slightly lower core strength compared to SP.
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.