BEYOND SP C40-2D-SD40-SP14 Indexable U-Drill Body | 40mm 2D CNC Boring Drill
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BEYOND SP C40-2D-SD40-SP14
40mm 2D Heavy-Duty U-Drill | The Ultimate Blind Hole Specialist
Industrial-Grade 40mm Indexable Boring Solution
The BEYOND SP C40-2D-SD40-SP14 is a precision-engineered indexable insert drill designed for high-torque CNC boring. Featuring a 40mm cutting diameter and a stable 2D depth ratio (80mm drilling reach), this tool excels in blind hole machining. With dual internal cooling channels and a reinforced spiral flute, it offers high-efficiency chip evacuation and superior tool life in steel and alloy workpieces.
Decoding the Model: SP C40-2D-SD40-SP14
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 40.0 mm | 1.574" |
| Shank Diameter (C) | 40.0 mm | 1.574" |
| Max Drilling Depth (2D) | 80.0 mm | 3.149" |
| Equivalent Model | SP-C1.57-2D-SD1.57-SP14 | |
Advanced 20CrMnTi Construction & Large-Volume Flutes
Superior Durability: Forged from high-grade 20CrMnTi alloy steel, the tool body undergoes a specialized vacuum quenching process to achieve a surface hardness of HRC 52-55. This ensures the indexable drill body remains rigid under the extreme forces of large diameter drilling.
Enhanced Chip Flow: The spiral flute (U-groove) design is widened to manage the heavy chip load typical of a 40mm bore. When combined with pressurized internal cooling, it prevents chip nesting, allowing for smooth CNC boring operations and preventing tool breakage.
Recommended Cutting Parameters (40mm 2D)
Guidelines for Steel and Alloy Machining. Adjust parameters based on machine rigidity:
Rotation Speed (N) = (Vc × 1000) / (π × 40)
Vc = Cutting Speed | π ≈ 3.14 | D = 40mm
- Cutting Speed (Vc): 110 - 190 m/min
- Feed Rate (f): 0.10 - 0.20 mm/rev
- Coolant Type: Internal through-spindle coolant is strictly recommended.
Pair with a heavy-duty BEYOND Side-Lock Holder for maximum stability:
SHOP COMPATIBLE C40 TOOL HOLDERSCustomer Success Stories
"Perfect for Blind Bores"
"Switched from WC to this SP drill for blind hole jobs. The flat bottom is much better and the tool body is incredibly tough."
- Johannes M. (Germany)
"Been running this on our CNC for three weeks straight. Chip evacuation is amazing with internal air."
- Robert T. (USA)
"Solid 40mm drill. No vibration at 2D depth. Great price."
- Carlos R. (Mexico)
"Excellent finish. SPMG14 inserts fit perfectly."
- Liam O. (Ireland)
"China's Beyond brand always delivers. Good quality steel."
- S. Chen (Singapore)
SP Series U-Drill Performance Factors
- Specifically optimized for Blind Hole Machining.
- Uses 4-cutting edges (SPMG14) for superior cost-efficiency.
- Heavier body core prevents vibration in 40mm operations.
- Higher torque requirements compared to WC drills.
- Requires stable coolant pressure for deep blind holes.
Technical Q&A
Q: Why is the SP model recommended for blind holes over the WC?
A: The SP U-drill uses square inserts which produce a flatter hole bottom. Additionally, the SP tool body has a thicker core, providing the stability needed for bottom-cutting.
Q: Can I use this for through-holes as well?
A: Yes, it will work for through-holes, but the SP design is specifically tuned for the rigors of blind hole boring. If you do only through-holes, consider our WC series.
Q: What is the benefit of the C40 shank?
A: The 40mm straight shank (C40) provides a massive surface area for clamping, which is vital to handle the high radial forces of 40mm drilling.
Machinist Tip: SP vs. WC U-Drills
SP Series (Square): The go-to for Blind Hole (Blind Bores). It provides better hole bottom flatness and higher body rigidity.
WC Series (Trigon): Best for Through Hole applications. It offers slightly lower cutting resistance but lacks the bottom-profile precision of the SP.
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.