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.
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.