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.
Need Help With BEYOND Inserts?
Looking for a BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.