BEYOND SP C25-2D-SD20-SP06 Indexable U-Drill Body | 20mm 2D CNC Boring Drill
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BEYOND SP C25-2D-SD20-SP06
20mm 2D Heavy-Duty U-Drill | Precision Blind Hole Boring Specialist
High-Performance 20mm Indexable Boring Solution
The BEYOND SP C25-2D-SD20-SP06 is a professional-grade indexable insert drill engineered for high-speed CNC boring and rapid hole drilling. Featuring a 20mm cutting diameter and a 2D depth ratio (40mm reach), this tool is the industry standard for blind hole machining. Equipped with internal cooling and optimized spiral flutes, it ensures superior chip evacuation and surface finish in carbon steel, alloy steel, and stainless steel.
Decoding the Model: SP C25-2D-SD20-SP06
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 20.0 mm | 0.787" |
| Shank Diameter (C) | 25.0 mm | 0.984" |
| Max Drilling Depth (2D) | 40.0 mm | 1.574" |
| Equivalent Model | SP-C1.0-2D-SD0.787-SP06 | |
Premium 20CrMnTi Alloy & High-Efficiency Flute Design
Industrial Build: This U-drill body is forged from 20CrMnTi alloy steel, treated with vacuum quenching to HRC 52-55. This gives the tool exceptional impact toughness and rigidity, essential for large diameter drilling without vibration. The surface is treated to resist corrosion and thermal wear during rapid hole boring.
Precision Spiral Flutes: The spiral flute (U-groove) is engineered for smooth chip discharge. Combined with dual internal cooling ports, it prevents heat buildup and chip packing—making it the ideal choice for blind hole machining where chip clearance is traditionally difficult.
Recommended Cutting Parameters (20mm 2D)
Standard starting values for Carbon Steel (HB < 200). Adjust for alloy complexity:
RPM (N) = (Vc × 1000) / (π × 20)
- Cutting Speed (Vc): 120 - 200 m/min
- Feed Rate (f): 0.06 - 0.16 mm/rev
- Coolant: Center-through internal cooling is mandatory for high performance.
Compatible with high-precision SPMG060204 Carbide Inserts:
SHOP SPMG06 CARBIDE INSERTSVerified Customer Feedback
"The Blind Hole King"
"I was having trouble with WC drills leaving a jagged bottom in blind holes. Switched to this 20mm SP drill and the bottom is now flat and clean."
- David K. (USA)
"Excellent chip evacuation. The internal coolant makes a massive difference on my lathe."
- Jean-Pierre (France)
"Top quality Chinese tool. Beyond is becoming my go-to for CNC tooling."
- Aris Z. (Greece)
"Very fast shipping to Mexico. Tool fits SPMG inserts perfectly."
- Carlos M. (Mexico)
"Super rigid. Running at 150m/min in mild steel with no issues."
- Sam H. (UK)
SP Series Indexable Drill: Advantages & Considerations
- Uses 4-edge SPMG square inserts for maximum economy.
- Designed specifically for Blind Hole Machining (Flat bottom).
- Thicker body core for increased tool stability and life.
- Higher cutting force than WC; requires stable machine clamping.
- Performance is heavily dependent on coolant pressure.
Technical Q&A
Q: Can this drill be used on a manual lathe?
A: It is highly recommended for CNC machines only, as rapid hole drilling requires consistent feed rates and high coolant pressure.
Q: What is the benefit of the SP series over WC?
A: The SP series uses square inserts which provide a flatter bottom for blind hole machining. WC trigon inserts are better suited for through-holes.
Q: Does it come with the screw and wrench?
A: Yes, each tool body includes the necessary Torx screw and wrench for insert installation.
Machinist Tip: SP vs. WC U-Drills
SP Series (Square): Best for Blind Hole applications. The square insert geometry ensures a flat base and higher tool body strength.
WC Series (Trigon): Specialized for Through Hole applications. These offer smoother entry/exit and slightly lower power requirements.
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.