BEYOND SP C20-5D-SD14.5-SP05 Indexable U-Drill Body | 14.5mm 5D CNC Deep Hole Drill
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BEYOND SP C20-5D-SD14.5-SP05
14.5mm 5D Indexable U-Drill | Precision Blind Hole Boring Specialist
Industrial 14.5mm Deep Hole Boring Specialist
The BEYOND SP C20-5D-SD14.5-SP05 is a high-performance indexable insert drill engineered for extreme stability in deep hole boring. With a 14.5mm cutting diameter and a 5D depth ratio (72.5mm 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-SD14.5-SP05
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 14.5 mm | 0.570" |
| Shank Diameter (C) | 20.0 mm | 0.787" |
| Max Drilling Depth (5D) | 72.5 mm | 2.854" |
| Imperial Model Equivalent | SP-C0.75-5D-SD0.570-SP05 | |
20CrMnTi Alloy & Advanced Spiral Flute Design
Premium Body Material: This U-drill CNC tool body is manufactured from 20CrMnTi high-strength 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 (14.5mm 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 - 0.10 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 14.5}$$
- 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 (WC) drills.
- Strict requirement for high-pressure coolant to clear deep chips at 72.5mm.
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 70mm 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 14.5mm 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 70mm 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 (72.5mm), 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.
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.