BEYOND SP C25-5D-SD13.5-SP05 Indexable U-Drill Body | 13.5mm 5D CNC Deep Hole Drill
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BEYOND SP C25-5D-SD13.5-SP05
13.5mm 5D Indexable U-Drill | Precision Blind Hole Boring Specialist
Industrial 13.5mm Deep Hole Boring Specialist
The BEYOND SP C25-5D-SD13.5-SP05 is a professional 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.
What Does the Model Code Mean?
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 13.5 mm | 0.531" |
| Shank Diameter (C) | 25.0 mm | 0.984" |
| Drilling Depth (5D) | 67.5 mm | 2.657" |
| Equivalent Model | SP-C1.0-5D-SD0.531-SP05 | |
20CrMnTi Alloy & High-Efficiency Spiral Flute
Premium 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 handle interrupted cuts during deep hole boring.
Optimized Spiral Flute (U-Groove): The specialized U-groove geometry features wide chip pockets. Combined with dual internal cooling holes, it allows high-pressure coolant to flush metal chips out of 67.5mm deep bores instantly, preventing chip packing and protecting the carbide inserts from heat failure.
Recommended Cutting Parameters (5D 13.5mm)
Suggested for Carbon Steel (HB < 250). Adjust based on machine rigidity:
- Cutting Speed (Vc): 100 - 160 m/min
- Feed Rate (f): 0.04 - 0.10 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 13.5}$$
- Coolant: High-pressure internal cooling (Min 1.5 MPa) is mandatory for 5D depth.
SP Series U-Drill: Advantages & Considerations
- Uses 4-edge SPMG square inserts (Higher cost-efficiency).
- Exceptional stability and verticality for Blind Hole Machining.
- Thicker tool core provides higher rigidity than WC drills for 5D reach.
- Higher power requirement compared to trigon drills.
- Strict requirement for high-pressure coolant to clear deep chips.
Verified Customer Feedback
"Precision at 5D"
"Running this for small diameter deep holes. Very impressive diameter control and no wandering."
- Robert H. (USA)"Tough Tool Body"
"Used for alloy steel. The cooling system is excellent. Lasts much longer than cheaper alternatives."
- Gunter P. (Germany)"Solid 13.5mm drill. Works perfectly on my Fanuc lathe."
- Kenji O. (Japan)
"Great for CNC machining centers. Excellent chip removal."
- Carlos R. (Mexico)
"Fast delivery and high quality finish."
- 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 or a center drill to ensure the tool enters perfectly straight.
Q: What is the benefit of the Side-Lock (C25) shank?
A: The 25mm 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.