BEYOND SP C25-2D-SD23-SP07 Indexable U-Drill Body | 23mm 2D CNC Boring Drill
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BEYOND SP C25-2D-SD23-SP07
23mm 2D Heavy-Duty U-Drill | Precision Blind Hole Boring Specialist
Industrial 23mm Indexable Boring Solution
The BEYOND SP C25-2D-SD23-SP07 is a high-performance indexable insert drill engineered for precision CNC boring and high-speed metal removal. With a 23mm cutting diameter and a 2D depth ratio (46mm reach), this tool is the professional choice for blind hole machining. Featuring internal cooling and a precision-engineered spiral flute, it ensures rapid chip evacuation and superior surface finish in carbon steel, alloy steel, and stainless steel.
Decoding the Model: SP C25-2D-SD23-SP07
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 23.0 mm | 0.905" |
| Shank Diameter (C) | 25.0 mm | 0.984" |
| Max Drilling Depth (2D) | 46.0 mm | 1.811" |
| Equivalent Model | SP-C1.0-2D-SD0.91-SP07 | |
Premium 20CrMnTi Alloy & High-Volume Spiral Flutes
Industrial Build: Our U-drill bodies are crafted from superior 20CrMnTi alloy steel, vacuum quenched to HRC 52-55. This core rigidity is essential for large diameter drilling stability and preventing tool deflection. The surface features a Black Oxide finish for superior thermal wear resistance during rapid hole boring cycles.
Advanced Slot Geometry: The tool features an optimized spiral flute (U-groove) specifically engineered to evacuate the high volume of chips produced by a 23mm bore. Integrated internal cooling holes allow high-pressure coolant to flush metal chips directly out of the cutting zone—essential for blind hole machining to prevent chip re-cutting.
Recommended Cutting Parameters (23mm 2D)
Optimal settings for Carbon Steel and Alloy Steel. Adjust based on CNC rigidity and material grade:
Rotation Speed (N) = (Vc × 1000) / (π × 23)
- Cutting Speed (Vc): 110 - 190 m/min
- Feed Rate (f): 0.08 - 0.18 mm/rev
- Coolant: Center-through internal cooling is mandatory.
Maximize stability with our high-performance BEYOND Side-Lock C25 Holder:
SHOP COMPATIBLE C25 TOOL HOLDERSVerified Customer Feedback
"Precision for Blind Holes"
"Using this for 23mm blind holes in 4140 steel. The bottom profile is flat and the chips clear out easily. Solid tool body."
- David K. (USA)
"Excellent chip flow. The dual internal coolant ports make a massive difference in deep holes."
- Marek W. (Poland)
"Rigid design. Fits SPMG07 inserts perfectly. No chatter even at high feed rates."
- Pedro S. (Brazil)
"Great quality/price ratio. Delivery to UK was very fast."
- Arthur L. (UK)
"Stable boring on my CNC lathe. Highly recommend."
- Kenji S. (Japan)
SP Series Indexable Drill: Advantages & Considerations
- Uses 4-edge SPMG square inserts for lower cost-per-edge.
- Optimized for Blind Hole Machining (Flatter hole bottom profile).
- Thicker body core provides maximum stability for 23mm diameters.
- Requires higher CNC torque compared to WC trigon drills.
- Performance is highly dependent on high-pressure internal coolant flow.
Technical Q&A
Q: Why choose SP over WC for blind hole drilling?
A: SP square inserts create a significantly flatter bottom compared to WC. 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 SPMG07 inserts?
A: It is designed for standard SPMG07T308 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 a 23mm drill, the maximum effective drilling depth is 46mm.
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 high-precision bores.
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 23mm 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.