BEYOND SP C40-5D-SD43-SP14 Indexable U-Drill | 43mm Deep Hole CNC Drill Body
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BEYOND SP C40-5D-SD43-SP14
Precision 43mm 5D Deep Hole U-Drill | High-Stability CNC Indexable Drill Body
Industrial-Grade 43mm Deep Hole Specialist
The BEYOND SP C40-5D-SD43-SP14 is a professional indexable insert drill designed for high-efficiency material removal. With a 43mm cutting diameter and a powerful 5D depth ratio, this fast hole U-drill is engineered for deep hole boring in tough alloys and structural steels. Its internal cooling system ensures superior chip evacuation and thermal control during continuous high-speed drilling on CNC lathes and machining centers.
Model Code Explanation
Technical Specifications & Unit Comparison
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter | 43.0 mm | 1.692" |
| Shank Diameter | 40.0 mm | 1.574" |
| Drilling Depth (5D) | 215.0 mm | 8.464" |
| Total Body Length | ~315.0 mm | 12.401" |
20CrMnTi Alloy & High-Efficiency Spiral Flute
Superior Tool Material: This U-drill body is manufactured from premium 20CrMnTi alloy steel. Through advanced vacuum quenching and tempering, the tool achieves a surface hardness that resists wear while maintaining the core toughness required for large diameter boring. This prevents tool snap under high-torque conditions.
Optimized Chip Flute: The spiral flute geometry is precision-ground to maximize chip space. Paired with dual internal coolant channels, it effectively flushes chips out of the 215mm deep hole, ensuring a smooth surface finish and preventing chip welding on the SPMG14 carbide inserts.
Recommended Cutting Parameters (43mm 5D)
Baseline recommendations for standard Carbon Steel (HRC < 30):
- Cutting Speed (Vc): 100 - 160 m/min.
- Feed Rate (f): 0.08 - 0.15 mm/rev.
- Formula for RPM (N): $$N = \frac{Vc \times 1000}{\pi \times 43}$$
- Internal Coolant: Minimum 1.5 - 2.0 MPa pressure required for 5D depth.
SP Series U-Drill Analysis
- Uses SPMG square inserts with 4 cutting edges (lower cost per hole).
- Exceptional stability and verticality for deep 5D holes.
- Stronger tool core compared to WC drills.
- Requires higher spindle power for 43mm diameter.
- Not recommended for very small diameter drilling (< 14mm).
Customer Feedback
"Incredible Reach"
"Drilling 200mm deep with the 43mm U-drill. It stayed perfectly centered. Very rigid body."
- Brian S. (Australia)"Best value for money"
"Quality matches European brands but at half the price. Highly recommend BEYOND tools."
- Hans W. (Germany)"Efficient chip removal"
"Internal coolant is powerful. No chip packing at the bottom of the hole."
- Tanaka K. (Japan)"Solid boring tool"
- Carlos M. (Brazil)
"Great for CNC lathes"
- Liam G. (UK)
Technical Q&A
Q: Can I use this on a manual drill press?
A: No. A 43mm 5D U-drill requires the rigidity and high-pressure coolant only found on CNC machines.
Q: Does this come with the SPMG14 inserts?
A: No, this is the tool holder body only. Inserts must be purchased separately.
Q: Why use a C40 shank for a 43mm drill?
A: The 40mm shank provides maximum clamping surface to handle the extreme torque of a 43mm cut without slipping.
Tooling Tip: SP vs. WC U-Drills
WC Series (Trigon): Best for general purpose drilling and lower spindle power machines. Offers good cost efficiency but lower core rigidity.
SP Series (Square): The professional choice for Deep Hole (5D) drilling. The square SPMG insert layout provides better balance and a thicker tool core, resulting in significantly straighter holes in heavy-duty CNC machining.
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.