S71907 ACB/P4ADGB
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The S71907 ACB/P4ADGB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a universally matchable (SU) bearing supplied in a pre-configured set of two, it enables simplified installation and optimal performance in high-speed arrangements. Its P4A tolerance class ensures superior running accuracy, while the phenolic cage and sealed design contribute to reliable operation under combined loads (radial and axial). This bearing is engineered for high-reliability scenarios where precision and stiffness are paramount.
S71907 ACB/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71907 | Bearing series and size designation (35mm bore, 55mm OD, 20mm width) |
| ACB | Angular Contact Bearing with a 25° contact angle and Light preload (Class B) |
| P4A | High-Precision Tolerance Class (exceeds ABEC 7 standards) |
| DGB | Universal Matchable (SU) bearing set (Duplex Group Back-to-Back arrangement) |
Structural Features and Performance Benefits
High Rigidity and Load Capacity: The 25° contact angle and universal matching (SU) design enable the bearing pair to effectively handle combined radial and axial loads from both directions, providing superior system stiffness.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for high-precision applications.
Optimized High-Speed Operation: The phenolic cage offers excellent strength-to-weight ratio, contributing to the high limiting speed of 56,000 rpm. The light preload (Class B) minimizes friction while maintaining shaft positioning accuracy.
Sealed and Lubricated Design: As a sealed bearing with factory-applied grease lubrication, it provides contamination protection and is ready for immediate use within its specified temperature range (-30°C to 110°C).
S71907 ACB/P4ADGB Bearing Typical Application Areas
The S71907 ACB/P4ADGB is ideally suited for precision machinery and high-speed equipment including:
- Machine Tool Spindles - for milling, grinding and turning centers
- High-Speed Motors and Spindles - where precision and rigidity are critical
- Precision Instrumentation - medical devices, measuring equipment
- Robotics and Automation - joint actuators and precision positioning systems
- Aerospace Components - gyroscopes, navigation systems
