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.
Need Help With BEYOND Inserts?
Looking for a BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.