BEYOND SP C40-2D-SD50-SP14 Indexable U-Drill Body | 50mm 2D CNC Boring Drill
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BEYOND SP C40-2D-SD50-SP14
50mm 2D Heavy-Duty U-Drill | Large Diameter Blind Hole Specialist
Industrial-Grade 50mm Large Diameter Boring Solution
The BEYOND SP C40-2D-SD50-SP14 is a powerhouse indexable insert drill engineered for high-torque CNC boring and large-scale metal removal. With a massive 50mm cutting diameter and a stable 2D depth ratio (100mm reach), this tool is the definitive choice for blind hole machining. Featuring dual internal cooling ports and reinforced spiral flutes, it ensures high-efficiency chip evacuation in heavy-duty steel and alloy applications.
Decoding the Model: SP C40-2D-SD50-SP14
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 50.0 mm | 1.968" |
| Shank Diameter (C) | 40.0 mm | 1.574" |
| Max Drilling Depth (2D) | 100.0 mm | 3.937" |
| Equivalent Model | SP-C1.574-2D-SD1.968-SP14 | |
Advanced 20CrMnTi Alloy & High-Volume Spiral Flutes
Unmatched Durability: This indexable drill body is forged from high-tensile 20CrMnTi alloy steel. Undergoing professional vacuum quenching to HRC 52-55, the tool body offers the extreme rigidity required for 50mm large diameter drilling. The Black Oxide surface treatment protects against thermal deformation and high-speed friction.
Engineered Grooves: The U-drill features an enlarged spiral flute (U-groove) specifically designed to handle the high volume of chips generated at 50mm diameters. Combined with internal cooling, this design prevents "chip packing" and ensures smooth, continuous CNC boring.
Recommended Cutting Parameters (50mm 2D)
Guidelines for Carbon/Alloy Steel. Due to the 50mm diameter, ensure machine torque is sufficient:
Rotation Speed (N) = (Vc × 1000) / (π × 50)
Vc = Cutting Speed | π ≈ 3.14 | D = 50mm
- Cutting Speed (Vc): 100 - 180 m/min
- Feed Rate (f): 0.08 - 0.15 mm/rev
- Coolant: Center-through internal cooling is essential to maintain insert life.
Pair with a heavy-duty BEYOND Side-Lock C40 Holder for maximum stability:
SHOP COMPATIBLE C40 TOOL HOLDERSVerified Global Reviews
"Incredible Rigidity"
"Drilling 50mm holes in tough alloy steel was always a challenge. This tool body is so stiff there is zero vibration."
- Thomas B. (USA)
"Perfect chip breaking with the SPMG14 inserts. The U-groove is huge!"
- Klaus R. (Germany)
"High quality forged body. Using it for large hydraulic parts with great success."
- Alberto M. (Italy)
"Fast delivery and exceptional performance for the price."
- Kevin J. (Australia)
"The internal cooling is very powerful. No more chip clogging."
- H. Tanaka (Japan)
SP Series Indexable Drill: Advantages & Considerations
- Uses 4-edge SPMG square inserts—highly economical for large diameter jobs.
- Optimized for Blind Hole Machining (Creates a flat hole bottom).
- Extremely robust core designed for high-load 50mm boring.
- Requires high-torque CNC machines for 50mm diameter drilling.
- Needs high-volume coolant flow to clear large chips effectively.
Technical Q&A
Q: Why is SP better than WC for 50mm blind bores?
A: SP square inserts provide a flatter hole bottom. In large diameter boring, the SP body’s structural core is thicker, which prevents vibration at 50mm sizes.
Q: What insert grade should I use?
A: We recommend SPMG140512 inserts. Choose a CVD coating for general steel or a PVD coating for stainless steel applications.
Q: Can I use this for through holes?
A: Yes, but SP is specifically optimized for blind holes. For dedicated high-speed through-hole work, WC series is an alternative.
Machinist Tip: SP vs. WC U-Drills
SP Series (Square): The choice for Blind Hole (Blind Bores). Square inserts create a flat profile and provide a stronger tool body for 50mm operations.
WC Series (Trigon): Best for Through Hole applications. WC inserts offer more edges but the thinner core makes it less ideal for high-pressure 50mm blind drilling.
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.