BEYOND SP C25-5D-SD24-SP07 Indexable U-Drill Body | 24mm 5D CNC Deep Hole Drill
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BEYOND SP C25-5D-SD24-SP07
24mm 5D Indexable U-Drill | Precision Blind Hole Boring Specialist
Industrial 24mm Deep Hole Boring Specialist
The BEYOND SP C25-5D-SD24-SP07 is a high-rigidity indexable insert drill engineered for extreme stability in deep hole boring. With a 24mm cutting diameter and a 5D depth ratio (120mm reach), this tool is the industry choice for blind hole machining. Featuring internal cooling and a specialized spiral flute, it ensures high-speed efficiency 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) | 24.0 mm | 0.945" |
| Shank Diameter (C) | 25.0 mm | 0.984" |
| Drilling Depth (5D) | 120.0 mm | 4.724" |
| Imperial Ref. Model | SP-C1.0-5D-SD0.945-SP07 | |
20CrMnTi Alloy & High-Efficiency Spiral Flute
Superior 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 withstand interrupted cuts during high-speed shallow hole drilling or deep 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 120mm deep bores instantly, preventing chip packing and protecting the carbide inserts from heat failure.
Recommended Cutting Parameters (5D 24mm)
Suggested for Carbon Steel (HB < 250). Adjust based on machine rigidity:
- Cutting Speed (Vc): 120 - 185 m/min
- Feed Rate (f): 0.05 - 0.11 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 24}$$
- 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 types for 5D reach.
- Higher power requirement compared to trigon (WC) drills.
- Sensitive to low-pressure coolant systems during deep boring.
Verified Customer Feedback
"Solid Deep Bores"
"Running this on our CNC lathe for 110mm deep blind holes. Zero vibration and perfect diameter control."
- Mark T. (USA)"Superior Rigidity"
"The 20CrMnTi steel is very tough. Much better bottom finish than the WC drills we used to use."
- Hans B. (Germany)"Fast shipping to Brazil. The spiral flute clears chips perfectly."
- Ricardo S. (Brazil)
"Excellent price. BEYOND tools never disappoint."
- Kenji Y. (Japan)
"Top tier indexable drill for blind holes."
- Liam G. (UK)
Technical Support Q&A
Q: Why is SP recommended for blind holes?
A: SP square inserts provide a flatter hole bottom profile and higher body rigidity compared to WC trigon models.
Q: What is the benefit of the Side-Lock (C25) shank?
A: The 25mm straight shank with a flat allows for massive clamping force, preventing tool rotation under high torque.
Q: Is a pilot hole required for 5D depth?
A: For 5D (120mm), we highly recommend starting with a 1D or 2D short U-drill to guide the tool for maximum straightness.
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 6 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.