BEYOND SP C25-5D-SD25-SP07 Indexable U-Drill Body | 25mm 5D CNC Deep Hole Drill
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BEYOND SP C25-5D-SD25-SP07
25mm 5D Indexable U-Drill | Precision Blind Hole Boring Specialist
Industrial-Grade 25mm Deep Hole Boring
The BEYOND SP C25-5D-SD25-SP07 is a high-performance indexable insert drill engineered for precision metal removal. With a 25mm cutting diameter and a massive 5D depth-to-diameter ratio, this fast hole U-drill is the ultimate tool for deep hole boring. Designed specifically for CNC lathe metal boring, it excels in creating flat-bottom blind holes with its optimized internal cooling system.
What Does the Model Code Mean?
Technical Data & Size Conversion
| Specification | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Cutting Diameter (SD) | 25.0 mm | 0.984" |
| Shank Diameter (C) | 25.0 mm | 0.984" |
| Drilling Depth (5D) | 125.0 mm | 4.921" |
| Imperial Ref. Model | SP-C1.0-5D-SD0.984-SP07 | |
20CrMnTi Alloy & High-Efficiency Spiral Flute
Superior Tool Body Material: This indexable drill body is forged from 20CrMnTi high-strength alloy steel. The surface is vacuum-quenched to achieve HRC 50-55, providing incredible wear resistance while the core remains shock-resistant to withstand interrupted cuts during deep hole boring.
Optimized Spiral Flute (U-Groove): The specialized U-groove geometry features wide chip pockets. Combined with dual internal cooling holes, it allows high-pressure coolant to flush metal chips out of 125mm deep bores instantly, preventing chip packing and protecting the carbide inserts from heat failure.
Recommended Cutting Parameters (5D 25mm)
Baseline settings for Medium Carbon Steel. Adjust for your machine rigidity:
- Cutting Speed (Vc): 120 - 180 m/min
- Feed Rate (f): 0.05 - 0.11 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 25}$$
- Coolant: High-pressure internal cooling (Min 1.5 MPa) is mandatory for 5D depth.
SP Series U-Drill: Advantages & Considerations
- Uses 4-edge SPMG square inserts (Higher cost-efficiency).
- Superior stability for Blind Hole Machining.
- Thicker tool core provides higher rigidity than WC drills for 5D reach.
- Higher power requirement compared to trigon drills.
- Strict requirement for internal coolant pressure to flush chips.
Verified Customer Feedback
"Solid for 5D bores"
"I was worried about vibration at 125mm depth, but this body is incredibly rigid. Clean blind holes every time."
- Robert J. (USA)
"BEYOND Quality"
"Excellent price-to-performance ratio. Much better bottom finish for blind holes than WC types."
- Jurgen S. (Germany)
"Fast shipping to Japan. The 20CrMnTi steel feels very high quality."
- Kenji T. (Japan)
"Good chip evacuation with proper coolant pressure."
- Ahmed R. (UAE)
"Five stars. Solid tool body."
- Steve L. (Australia)
Technical Q&A
Q: Is a pilot hole required for 5D reach?
A: For 5D (125mm), we highly recommend starting with a 1D or 2D short U-drill to guide the tool for maximum straightness.
Q: Why is SP better for blind holes?
A: SP square inserts provide a flatter hole bottom profile and higher body rigidity compared to WC models.
Q: What happens if I don't use internal coolant?
A: For 5D depths, chips will pack and break the inserts. Internal cooling is mandatory for safety and performance.
Technical Tip: SP vs. WC U-Drills
SP Series (Square): The professional choice for Blind Hole (Blind Bores). The square insert geometry provides a flatter hole bottom. Superior rigidity for Deep Hole (5D) drilling.
WC Series (Trigon): Primarily used for Through Hole applications. WC inserts offer more cutting edges but the tool core is 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.