BEYOND SP C25-2D-SD18-SP06 Indexable U-Drill Body | 18mm 2D CNC Boring Drill
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BEYOND SP C25-2D-SD18-SP06
18mm 2D Heavy-Duty U-Drill | Precision Blind Hole Boring Specialist
High-Performance 18mm Indexable Boring Solution
The BEYOND SP C25-2D-SD18-SP06 is an industrial-grade indexable insert drill engineered for high-speed CNC boring and rapid hole drilling. Featuring an 18mm cutting diameter and a 2D depth ratio (36mm effective reach), this tool is the specialist choice for blind hole machining. Built with internal cooling channels and optimized spiral flutes, it ensures superior chip evacuation and surface finish across various steel alloys.
Decoding the Model: SP C25-2D-SD18-SP06
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 18.0 mm | 0.708" |
| Shank Diameter (C) | 25.0 mm | 0.984" |
| Max Drilling Depth (2D) | 36.0 mm | 1.417" |
| Equivalent Model | SP-C1.0-2D-SD0.708-SP06 | |
Advanced 20CrMnTi Alloy & High-Efficiency Flute Design
Industrial Build: Our U-drill body is forged from premium 20CrMnTi alloy steel, vacuum quenched to HRC 52-55. This metallurgical composition provides the high rigidity required for large diameter drilling and prevents tool deflection under high load. The surface is carbonitrided to enhance thermal wear resistance during rapid hole boring cycles.
Precision Spiral Flutes: The tool features a high-volume spiral flute (U-slot) engineered specifically for the 18mm bore. Integrated dual internal cooling holes deliver high-pressure fluid directly to the cutting edge—an essential feature for blind hole machining to ensure chips are flushed out before re-cutting occurs.
Recommended Cutting Parameters (18mm 2D)
Optimal starting values for General Carbon Steel. Adjust based on CNC rigidity:
Rotation Speed (N) = (Vc × 1000) / (π × 18)
- Cutting Speed (Vc): 120 - 200 m/min
- Feed Rate (f): 0.05 - 0.15 mm/rev
- Coolant: Center-through internal cooling is mandatory for chip evacuation.
Maximize performance with our high-precision SPMG06 Carbide Inserts:
SHOP SPMG06 CARBIDE INSERTSVerified Customer Feedback
"The Blind Hole Specialist"
"Switched from WC to this SP drill for blind bores. The bottom finish is remarkably flat. Body is very rigid."
- Mike T. (USA)
"Excellent chip evacuation. The internal coolant makes a massive difference in stainless."
- Gunther M. (Germany)
"Top quality finish. Beyond tools are as good as the big brands."
- Luca R. (Italy)
"Fast shipping to the UAE. Tool performs perfectly on my CNC lathe."
- Ahmed H. (UAE)
"Solid construction. Great value."
- Steve B. (Australia)
SP Series Indexable Drill: Advantages & Considerations
- Uses 4-edge SPMG square inserts for lower cost-per-edge.
- Optimized for Blind Hole Machining (Creates a flat-bottom profile).
- High body core thickness for maximum stability during boring.
- Higher cutting torque requirement than WC trigon drills.
- Relies on high coolant pressure for chip flushing in deep holes.
Technical Q&A
Q: Why choose SP over WC for blind hole drilling?
A: SP square inserts create a significantly flatter bottom. The SP body is also designed with a thicker core, which is essential for stability in large diameter boring.
Q: Is this tool body compatible with all SPMG06 inserts?
A: It is designed for standard SPMG060204 carbide inserts. Using BEYOND brand inserts is recommended for the best fit.
Q: What is the maximum depth for this 2D drill?
A: The 2D indicates 2x the diameter. For an 18mm drill, the maximum effective drilling depth is 36mm.
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.
WC Series (Trigon): Primarily used for Through Hole applications. WC inserts offer more edges but the body core is thinner, making it less rigid for 18mm tasks.
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.