BEYOND SP C40-4D-SD44-SP14 Indexable U-Drill Body | 44mm 4D CNC Deep Hole Drill
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BEYOND SP C40-4D-SD44-SP14
44mm 4D Heavy-Duty U-Drill | Precision Blind Hole Boring Specialist
High-Performance 44mm Indexable Boring Tool
The BEYOND SP C40-4D-SD44-SP14 is a professional-grade indexable insert drill designed for extreme stability in large diameter drilling. With a 44mm cutting diameter and a 4D depth ratio (176mm reach), this tool is the industry standard for blind hole machining. Featuring internal cooling and a precision-engineered spiral flute, it ensures high-speed chip evacuation and superior surface finish on CNC lathes and machining centers.
Decoding the Model: SP C40-4D-SD44-SP14
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 44.0 mm | 1.732" |
| Shank Diameter (C) | 40.0 mm | 1.575" |
| Max Drilling Depth (4D) | 176.0 mm | 6.929" |
| Compatible Model | SP-C1.50-4D-SD1.732-SP14 | |
Advanced 20CrMnTi Alloy & High-Volume Spiral Flute
Durable Tool Body Material: This indexable drill body is forged from premium 20CrMnTi alloy steel. The surface is vacuum-quenched to reach HRC 52-55, providing immense wear resistance while the core remains shock-absorbent to handle interrupted cuts in heavy-duty deep hole boring operations.
Optimized Spiral Flute (U-Groove): The wide U-groove spiral flute design minimizes friction and maximizes chip flow space. Combined with dual internal cooling holes, high-pressure coolant flushes metal chips out instantly, protecting your SPMG carbide inserts from thermal failure at 176mm depths.
Recommended Cutting Parameters (44mm 4D)
Optimized for Carbon Steel (HB < 250). Use internal cooling:
- Cutting Speed (Vc): 110 - 170 m/min
- Feed Rate (f): 0.08 - 0.18 mm/rev
- Rotation Speed (N): Approximately 800 - 1200 RPM depending on material.
- Requirement: Internal coolant (thru-tool) is mandatory for 4D depth to prevent chip packing.
Need a side-lock holder for your 40mm shank U-Drill?
SHOP COMPATIBLE C40 TOOL HOLDERSVerified Customer Reviews
"Impressive Rigidity"
"Using the SD44 in 4140 alloy. The BEYOND body handles the torque beautifully at 4D depth. No vibration."
- Robert B. (USA)
"Clean Blind Holes"
"I swapped from WC to SP for my blind hole projects and the bottom is much flatter. Excellent chip removal."
- Klaus H. (Germany)
"Top quality 20CrMnTi steel. Fast shipping to Australia."
- Mark L. (Australia)
"A heavy-duty beast. Perfect for large diameter boring on our CNC lathes."
- S. Patel (India)
"Best value indexable drill. BEYOND is our go-to brand now."
- Andre V. (Brazil)
SP Series Indexable Drill: Advantages & Considerations
- Uses 4-edge SPMG square inserts for lower cost per edge.
- Optimized for Blind Hole Machining with a flatter hole bottom.
- Reinforced core provides superior rigidity for 4D-5D depths.
- Requires higher torque and machine horsepower for 44mm diameter.
- Coolant pressure is critical to prevent chip packing at full 176mm depth.
Technical Q&A
Q: Why use SP instead of WC for blind holes?
A: SP square inserts create a significantly flatter profile at the bottom of the bore. Additionally, the tool body is thicker and more rigid, which is essential for deep bores.
Q: Does the drill come with carbide inserts?
A: No, this is for the tool body only. It is compatible with SPMG140512 inserts.
Q: What is the benefit of the 20CrMnTi material?
A: It combines a hard wear-resistant surface to fight friction with a tough interior to absorb high-impact drilling loads.
Machinist Tip: SP vs. WC U-Drills
SP Series (Square): The professional choice for Blind Hole (Blind Bores). Square inserts create a flatter bottom and offer maximum core strength for 4D-5D deep hole boring.
WC Series (Trigon): Primarily used for Through Hole applications. WC inserts offer more cutting edges but the body core is thinner, making it less rigid than SP for extreme depths.
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.