BEYOND SP C40-5D-SD40-SP11 Indexable U-Drill | 40mm CNC Deep Hole Drill
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BEYOND SP C40-5D-SD40-SP11
High-Precision 40mm 5D Indexable U-Drill Body
Master Deep Hole CNC Machining
The BEYOND SP C40-5D-SD40-SP11 is a professional-grade indexable insert drill designed for extreme stability in deep hole boring. With a 40mm cutting diameter and a 5D depth ratio, this fast hole U-drill is engineered for high-efficiency metal removal on CNC lathes and machining centers. Whether you are working on shallow hole drilling or deep penetration, this tool provides the rigidity needed for high-speed drilling in carbon steel, alloy steel, and stainless steel.
What Does the Model Code Mean?
Every letter in our industrial U-drill code represents a technical specification:
Technical Data & Size Conversion
| Specification | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 40.0 mm | 1.575" |
| Shank Diameter (C) | 40.0 mm | 1.575" |
| Max Drilling Depth (5D) | 200.0 mm | 7.874" |
| Total Body Length | ~300.0 mm | 11.811" |
Material Science & Slot Design
Premium Tool Body Material: This drill is crafted from high-performance 20CrMnTi alloy steel. The indexable drill body undergoes vacuum quenching to ensure a high surface hardness of HRC 50-55, providing incredible wear resistance while the core remains tough to absorb vibration during heavy-duty machining.
Optimized Spiral Flute (U-Groove): The spiral flute geometry is precision-engineered to provide maximum chip clearance. For a 40mm diameter at 200mm depth, chip packing is a risk; however, our polished large-capacity flutes, combined with dual internal coolant holes, ensure chips are flushed out instantly, protecting both the tool and the workpiece.
Recommended Cutting Parameters
Baseline settings for 45# Steel (HB180-220). Adjust based on your specific material:
- Cutting Speed (Vc): 100 - 160 m/min
- Feed Rate (f): 0.08 - 0.15 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 40}$$
- Note: High-pressure internal cooling (Min 1.5 MPa) is mandatory for 5D depth.
SP Series U-Drill: The Professional Choice
- Uses SPMG square inserts: 4 usable cutting edges per insert (cost-effective).
- Superior hole verticality and straightness in deep 5D holes.
- Higher body rigidity compared to WC-type drills.
- Requires higher spindle power/torque for 40mm diameter.
- Insert cost per piece is higher than triangular (WC) inserts.
Global Verified Reviews
"Incredible Stability"
"I used this 40mm drill for 180mm depth in alloy steel. The hole was perfectly straight. Much better than my old WC drill."
- James M. (USA)
"Efficient"
"Top quality from China. Fast shipping to Germany. Works perfectly with BEYOND inserts."
- Klaus H. (Germany)
"Very solid tool body."
- Kenji T. (Japan)
"Best price for 5D reach."
- Ahmed R. (UAE)
Frequently Asked Questions
Q: Can I use this on a manual lathe?
A: It is not recommended. U-drills require high rigidity and continuous internal cooling, which manual machines typically lack.
Q: What is the benefit of the Side-Lock C40 shank?
A: The C40 shank provides the massive clamping surface needed to prevent tool slippage under the high torque of a 40mm cut.
Q: Is a pilot hole necessary?
A: For 5D drilling, we recommend starting with a short 2D U-drill for the first 10-20mm to ensure the 5D tool stays perfectly centered.
Quick Tip: WC vs. SP U-Drills
WC Series (Trigon): Best for general purpose and low spindle power machines. Lower insert price but less verticality.
SP Series (Square): The heavy-duty choice for Deep Hole (5D) and large diameters. The SPMG square insert offers 4 edges and superior hole finish, making it the standard for CNC boring in professional workshops.
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.