BEYOND SP C25-2D-SD20.5-SP06 Indexable U-Drill Body | 20.5mm 2D CNC Boring Drill
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BEYOND SP C25-2D-SD20.5-SP06
20.5mm 2D Heavy-Duty U-Drill | Precision Blind Hole Boring Specialist
Precision 20.5mm Indexable Boring Solution
The BEYOND SP C25-2D-SD20.5-SP06 is a high-performance indexable insert drill engineered for high-speed CNC boring and rapid hole drilling. Featuring a 20.5mm cutting diameter and a 2D depth ratio (41mm reach), this tool is the primary choice for blind hole machining. Equipped with internal cooling and optimized spiral flutes, it ensures superior chip evacuation and surface finish in carbon steel, alloy steel, and stainless steel.
Decoding the Model: SP C25-2D-SD20.5-SP06
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 20.5 mm | 0.807" |
| Shank Diameter (C) | 25.0 mm | 0.984" |
| Max Drilling Depth (2D) | 41.0 mm | 1.614" |
| Equivalent Model | SP-C1.0-2D-SD0.807-SP06 | |
High-Rigidity 20CrMnTi Alloy & Precision Flute Design
Premium Metallurgy: This U-drill body is forged from 20CrMnTi alloy steel and treated with vacuum quenching to achieve HRC 52-55. This ensures the large diameter drilling stability required for high-torque applications. The surface is protected by a professional-grade coating to prevent wear during rapid hole boring.
Superior Chip Flow: The spiral flute geometry is specifically calculated for the 20.5mm diameter to prevent chip packing. Dual internal cooling ports deliver high-pressure fluid directly to the indexable inserts, which is vital for maintaining tool life during blind hole machining.
Recommended Cutting Parameters (20.5mm 2D)
Standard starting points for General Steel. Fine-tune based on machine rigidity:
N (RPM) = (Vc × 1000) / (π × 20.5)
- Cutting Speed (Vc): 120 - 200 m/min
- Feed Rate (f): 0.06 - 0.16 mm/rev
- Requirement: High-pressure internal cooling is essential for SP series.
Compatible with SPMG060204 Indexable Inserts. View our high-performance grades:
SHOP SPMG06 CARBIDE INSERTSGlobal Customer Feedback
"Solid Blind Hole Performance"
"I use the 20.5mm for blind boring on my CNC. It leaves a very square bottom. Much better than the WC version for this job."
- Mark T. (Canada)
"Coolant flow is perfect. No vibration during heavy cuts."
- Hans R. (Germany)
"Excellent value. Fits SPMG06 inserts from different brands perfectly."
- Fabio L. (Italy)
"Rapid hole drilling is now much easier. Great chip evacuation."
- Rajesh V. (India)
"Built to last. Arrived very quickly in the UK."
- Liam O. (UK)
SP Series Indexable Drill: Performance Analysis
- Uses SPMG square inserts: 4 usable edges for economy.
- Optimized for Blind Hole Machining (Flat bottom profile).
- Enhanced core thickness for high-speed rapid hole boring.
- Slightly higher cutting resistance than WC drills.
- Absolute requirement for center-through internal cooling.
Technical Q&A
Q: Can I use this for through-holes?
A: Yes, but it is specifically optimized for blind holes. If you only do through-holes, WC might be slightly more efficient.
Q: What inserts should I buy?
A: This body is compatible with all standard SPMG060204 inserts.
Q: What is the benefit of the 20CrMnTi material?
A: It provides superior impact toughness and fatigue strength, preventing the tool from snapping during heavy CNC boring operations.
Machinist Tip: SP vs. WC Comparison
SP Series: Specialized for Blind Hole work. Square inserts provide a flat hole bottom and superior tool body rigidity.
WC Series: Optimized for Through Hole work. Trigon inserts offer easier cutting and slightly lower power consumption.
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.