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.
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.