BEYOND SP C40-2D-SD34.5-SP14 Indexable U-Drill Body | 34.5mm 2D CNC Boring Drill
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BEYOND SP C40-2D-SD34.5-SP14
34.5mm 2D Heavy-Duty U-Drill | Precision Blind Hole Boring Specialist
Industrial 34.5mm Indexable Boring Solution
The BEYOND SP C40-2D-SD34.5-SP14 is a professional indexable insert drill engineered for high-torque CNC boring. With a 34.5mm cutting diameter and a 2D depth ratio (69mm reach), this tool is a dedicated blind hole machining specialist. Featuring dual internal cooling ports and an optimized spiral flute, it ensures high-speed efficiency in carbon steel, alloy steel, and stainless steel.
Model Breakdown: SP C40-2D-SD34.5-SP14
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 34.5 mm | 1.358" |
| Shank Diameter (C) | 40.0 mm | 1.574" |
| Max Drilling Depth (2D) | 69.0 mm | 2.716" |
| Equivalent Model | SP-C1.57-2D-SD1.35-SP14 | |
Premium 20CrMnTi Alloy & High-Volume Spiral Flutes
Industrial Build: Our U-drill bodies are crafted from superior 20CrMnTi alloy steel, vacuum quenched to HRC 52-55. This ensures the 34.5mm drill remains rigid under high-pressure rapid hole boring cycles, reducing vibration and extending the life of your SPMG carbide inserts.
Advanced Slot Geometry: The tool body features an enlarged spiral flute (U-groove) designed for the massive chip volume of a 34.5mm bore. The internal cooling system flushes coolant through the head, ensuring chips are evacuated instantly—preventing "chip packing" in deep blind hole machining.
Recommended Cutting Parameters (34.5mm 2D)
Settings for Carbon Steel (HB < 250). Adjust based on material hardness:
Rotation Speed (N) = (Vc × 1000) / (π × 34.5)
- Cutting Speed (Vc): 110 - 190 m/min
- Feed Rate (f): 0.10 - 0.20 mm/rev
- Coolant: Mandatory Center-through internal cooling.
Maximize stability with our high-performance BEYOND Side-Lock C40 Holder:
SHOP COMPATIBLE C40 TOOL HOLDERSVerified Customer Feedback
"Exceptional rigidity"
"I've swapped all my old boring bars for this 34.5mm U-drill. Much faster for blind hole production."
- Hans M. (Germany)
"Fits SPMG14 perfectly. No vibration even at high feed rates."
- Sarah L. (Canada)
"Fast shipping to Melbourne. Tooling works as described."
- James R. (Australia)
"Best price for 34.5mm boring tools on the market."
- Mateo G. (Mexico)
"Solid 2D depth stability."
- Kenji S. (Japan)
SP Series U-Drill: Pros & Cons
- Flat-bottom geometry ideal for blind holes.
- Economical 4-edge SPMG inserts.
- Increased core thickness for high-rigidity boring.
- Requires higher CNC torque for 34.5mm diameters.
- Must have high-pressure internal coolant to function correctly.
Frequently Asked Questions
Q: Can I use this for through-holes?
A: Yes, but the SP series is optimized for blind holes. For exclusive through-hole work, the WC series is often faster due to chip-breaking geometry.
Q: What inserts does this use?
A: It uses SPMG140512 or similar SPMG14 carbide inserts.
Q: Does it include the mounting screw and wrench?
A: Yes, all BEYOND U-drill bodies include the required insert screws and a Torx wrench.
Quick Tip: SP vs. WC Selection
Choose the SP Series if you are machining blind holes or need a flatter hole base. The 4-edge square insert is more robust. Choose the WC Series for through-hole drilling where productivity and 6-edge economy are the priority.
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.