S71926 ACD/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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S71926 ACD/P4ADBA Bearing Product Overview & Core Advantages
The S71926 ACD/P4ADBA is a super-precision double row angular contact ball bearing designed for the most demanding applications. Engineered to a P4A tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its core advantage lies in its ability to simultaneously handle significant combined loads—both radial and bidirectional axial loads—thanks to its duplex back-to-back (DB) arrangement. This configuration, combined with an extra light preload, ensures high rigidity and minimal runout, making it ideal for high-speed spindles and other precision machinery requiring superior performance and reliability.
S71926 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71926 | Denotes the bearing series and size (130mm bore, 180mm OD). |
| ACD | Indicates a 25° contact angle and a Duplex Back-to-Back (DB) pre-set arrangement. |
| P4A | Specifies the tolerance class, representing very high running accuracy and dimensional conformity. |
| DBA | Confirms the duplex back-to-back arrangement and the extra light preload (Class A). |
S71926 ACD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads, ensuring exceptional shaft positioning accuracy and system stability.
- Superior Load Capacity: The double row design and 25° contact angle provide a high capacity for combined radial and axial loads from both directions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel balls and optimized internal geometry contribute to a high limiting speed of 11,000 rpm.
- Sealed & Pre-Lubricated: The sealed design with grease lubrication protects against contamination and provides long-term, maintenance-free operation within a specified temperature range.
S71926 ACD/P4ADBA Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications where accuracy, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Motors: Spindles for PCB drilling and routing.
- Medical Equipment: High-speed rotors in dental handpieces and centrifuges.
- Aerospace & Defense: Gyroscopes, radar systems, and other precision instrumentation.
