BEYOND WC40-2D-SD51-WC08 Indexable U-Drill | 51mm Large Diameter CNC Drill Body
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BEYOND WC40-2D-SD51-WC08
Professional 51mm 2D Indexable U-Drill | Industrial CNC Performance
High-Efficiency 51mm Indexable Metal Boring
The BEYOND WC40-2D-SD51-WC08 is a heavy-duty indexable insert drill engineered for massive material removal in CNC machining centers. As a specialized fast hole U-drill, it features a 51mm cutting diameter with a 2D depth ratio. This tool is optimized for internal cooling drilling in carbon steel, alloy steel, and stainless steel, ensuring maximum productivity for large diameter boring projects. Made in China with premium industrial standards.
Model Code Specification Breakdown
Technical Data & Units Comparison
| Feature | Metric Model (mm) | Imperial Equivalent (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 51.0 mm | 2.008" |
| Shank Diameter | 40.0 mm | 1.575" |
| Max Drilling Depth (2D) | 102.0 mm | 4.015" |
| Product Model | WC40-2D-SD51 | WC1.57-2D-SD2.00 |
Material Integrity & Optimized Flute Design
Hardened Body Material: Forged from high-performance quenched alloy steel (20CrMnTi), this 51mm U-drill body is treated for maximum surface hardness. It resists vibration and withstands the high cutting forces required for large diameter metal boring.
Optimized Chip-Evacuation Slots: The spiral flute geometry and wide chip-breaker slots are designed to prevent chip packing. When combined with the internal cooling ports, metal chips are flushed out instantly, maintaining a smooth bore and extending the life of your CNC lathe tool.
Recommended Cutting Parameters
Optimize your CNC hole making efficiency with these baseline settings for the 51mm drill:
- Cutting Speed (Vc): 100 - 180 m/min (Depending on material hardness).
- Feed Rate (f): 0.08 - 0.18 mm/rev.
- Rotation Speed (N): Calculated via $$N = \frac{Vc \times 1000}{\pi \times 51}$$
- Coolant Strategy: High-pressure internal cooling is mandatory for 51mm bores.
WC Type U-Drill: Advantages & Considerations
- Uses WCMX / WCMT inserts with 3 usable cutting edges (Cost-effective).
- Exceptional stability on uneven or slanted entry surfaces.
- Reduced cutting torque compared to square insert drills.
- Requires high spindle power (kW) for 51mm diameters.
- Standard hole tolerance is roughly +0.10mm to +0.20mm.
Verified Global Customer Feedback
"Solid and Rigid"
Dieter H. (Germany)
"Perfect 51mm Holes"
Mark S. (USA)
"Fast Chip Flow"
Hiroshi Y. (Japan)
"Great for Alloy Steel"
Luca B. (Italy)
"Consistent BEYOND Quality"
Andrew P. (UK)
Frequently Asked Questions
Q: Does this drill body fit other brands of WC08 inserts?
A: Yes, it is manufactured to standard ISO dimensions and is compatible with any standard WCMX/WCMT 0804 inserts.
Q: Can I use this for blind holes?
A: Yes. The WC U-drill provides a relatively flat bottom, making it excellent for blind hole boring.
Q: What is the benefit of the 2D length?
A: The 2D (102mm) length offers maximum tool rigidity, allowing for faster feed rates and better accuracy on shorter holes.
Pro-Tip: 2D-5D Drilling Logic
Choosing the right depth is vital for CNC performance. 2D drills (like this SD51 model) provide the highest stability and are best for roughing. 3D to 5D drills allow for deep hole reach but require much higher coolant pressure and more conservative feed rates to avoid vibration and chip clogging.
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.