BEYOND SP C40-3D-SD43-SP14 Indexable U-Drill Body | 43mm 3D CNC Boring Drill
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BEYOND SP C40-3D-SD43-SP14
43mm 3D Heavy-Duty U-Drill | High-Rigidity Blind Hole Specialist
Industrial-Grade 43mm Indexable Boring Solution
The BEYOND SP C40-3D-SD43-SP14 is a professional indexable insert drill designed for high-torque large diameter boring. With a 43mm cutting diameter and a 3D depth ratio (129mm max depth), this tool is the industry standard for blind hole machining. Featuring precision-engineered internal cooling and a robust spiral flute, it ensures efficient chip evacuation and exceptional surface finish on CNC lathes and machining centers.
Decoding the Model: SP C40-3D-SD43-SP14
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 43.0 mm | 1.693" |
| Shank Diameter (C) | 40.0 mm | 1.575" |
| Max Drilling Depth (3D) | 129.0 mm | 5.079" |
| Equivalent Model | SP-C1.575-3D-SD1.693-SP14 | |
High-Performance 20CrMnTi Build & Spiral Flute Efficiency
Durable Body Material: This indexable drill body is manufactured from high-strength 20CrMnTi alloy steel. The surface is treated with a specialized hardening process (HRC 52-55), providing the wear resistance and toughness required for deep hole drilling in hardened steels.
Optimized U-Slot Design: The 43mm U-drill features a large-volume spiral flute. When coupled with the dual internal cooling holes, it allows for high-pressure lubricant flow to discharge chips continuously, preventing "chip packing" even during large diameter boring in 3D depth applications.
Recommended Cutting Parameters (43mm 3D)
Optimized for Carbon Steel and Alloy Steel. Adjust based on machine horsepower:
- Cutting Speed (Vc): 110 - 180 m/min
- Feed Rate (f): 0.08 - 0.16 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 43}$$
- Coolant Requirement: High-pressure internal cooling is essential for heat dissipation.
Need a heavy-duty side-lock holder for this 40mm shank?
SHOP COMPATIBLE C40 TOOL HOLDERSCustomer Testimonials
"Outstanding 43mm stability"
"Solid drill body. The core is very thick, which reduces vibration in our large CNC machining center."
- Robert H. (Germany)
"Highly Efficient"
"Switched to BEYOND for all our 3D U-drills. The SP geometry is perfect for blind holes."
- Marek W. (Poland)
"Precision is 10/10. SPMG14 inserts fit snugly and give a very flat bottom."
- Pedro S. (Brazil)
"Fast delivery and great industrial quality. A professional tool for high-volume shops."
- Arthur L. (UK)
"Runs smoothly on our Fanuc lathes. Very reliable supplier."
- Y. Watanabe (Japan)
SP Series Indexable Drill: Performance Analysis
- Uses 4 cutting edges (SPMG), reducing cost per hole.
- Optimized for Blind Hole Machining (Flatter bottom).
- Thick core provides higher rigidity for 43mm diameter torque.
- Needs significant machine horsepower to drive a 43mm drill.
- Coolant pressure must be maintained for chip clearance.
Frequently Asked Questions
Q: What is the primary difference between SP and WC U-drills?
A: SP models use square inserts and are designed for blind holes because they leave a flatter bottom. WC models use trigon inserts and are better for through holes.
Q: Do I need to buy special bolts?
A: No, the drill comes with the necessary Torx screws and wrench. You only need to purchase SPMG140512 inserts.
Q: Can I use this for off-center drilling?
A: Yes, indexable drills can handle slight radial offsets to adjust hole size, provided the setup is rigid.
Expert Tip: SP vs. WC for 43mm Drilling
SP Series: Specialist for Blind Bores. The square insert geometry provides superior stability in large diameter tasks, resulting in higher precision for bottom-end machining.
WC Series: Specialist for Through Hole applications. While WC offers more edges per insert, the tool body core for WC is typically thinner, making SP the preferred choice for heavy 43mm boring operations.
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.