S71909 ACE/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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S71909 ACE/P4ADBA Bearing Product Overview & Core Advantages
The S71909 ACE/P4ADBA is a metric precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. This duplex back-to-back (DB) matched set features an extra light preload (Class A), ensuring minimal runout and stable rotational performance under combined radial and axial loads. Manufactured to a P4A tolerance class, it delivers superior running accuracy, making it an ideal choice for high-speed spindles and other high-precision machinery where reliability is critical.
S71909 ACE/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7 | Bearing Series | Indicates a high-precision angular contact ball bearing series. |
| 1909 | Size Designation | Specifies the bore diameter (45 mm), outside diameter (68 mm), and width (24 mm). |
| ACE | Contact Angle & Design | A 25° contact angle optimized for carrying significant axial loads. |
| P4A | Tolerance Class | Denotes very high precision grade with tight dimensional and running accuracy tolerances. |
| DB | Matched Arrangement | Duplex Back-to-Back mounting provides high rigidity and moment load capacity. |
S71909 ACE/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The duplex back-to-back (DB) arrangement of the two bearings creates a rigid support system that effectively resists moment loads and provides excellent stability. This configuration, combined with the 25° contact angle, enables the bearing set to handle substantial combined radial and axial loads simultaneously.
High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 41,000 rpm. This makes the bearing suitable for demanding high-speed applications.
Sealed and Lubricated for Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is designed for maintenance-free operation within its specified temperature range of -30°C to 110°C.
Precision Engineering: Manufactured to P4A tolerance class from high-grade chrome steel, this bearing guarantees exceptional running accuracy, low noise, and long service life in precision machinery.
S71909 ACE/P4ADBA Bearing Typical Application Areas
The S71909 ACE/P4ADBA is engineered for high-performance applications, including:
- Machine Tool Spindles for milling, grinding, and turning centers
- High-Frequency Spindles in PCB drilling and routing machines
- Precision gearboxes and robotic actuators
- Medical and dental equipment spindles
- High-speed pumps and compressors
