71902 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71902 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71902 ACDGB/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and superior running accuracy. Manufactured to P4A tolerance class, it delivers exceptional dimensional stability and rotational precision. Its key advantage lies in its ability to accommodate combined loads (radial and axial) efficiently, making it ideal for high-speed spindles and precision machinery. The light preload (Class B) ensures minimal deflection under operational stresses, contributing to enhanced system rigidity and positioning accuracy.
71902 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Basic bearing series, indicating a metric, single-row angular contact design with a 15mm bore. |
| AC | Angular Contact design with a 25° contact angle, optimized for high axial load capacity. |
| DGB | Universal Matchable (SU) bearing. Can be mounted in pairs (back-to-back, face-to-face, or tandem) to handle complex load conditions. |
| P4A | High-Precision Tolerance Class. Exceeds standard ABEC 7/ISO P4 tolerances, ensuring ultra-low runout and vibration for demanding applications. |
71902 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High-Speed Performance: The phenolic resin cage offers low mass and excellent sliding properties, enabling a high limiting speed of 95,000 rpm. This makes it suitable for high-speed spindle applications.
- Superior Rigidity & Load Capacity: The 25° contact angle and robust construction provide high resistance to axial loads while maintaining good radial load capacity. The light preload enhances system stiffness without generating excessive heat.
- Precision Engineering: Manufactured to P4A tolerances with tight dimensional control on the bore, outside diameter, and width. This guarantees consistent performance and interchangeability in precision assemblies.
- Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be paired with other identical bearings to form a matched set, simplifying installation and optimizing preload and stiffness in multi-bearing arrangements.
71902 ACDGB/P4A Bearing Typical Application Areas
The 71902 ACDGB/P4A is engineered for high-performance applications where precision and speed are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Robotics: Joint and arm actuators requiring high rigidity and accuracy.
- Medical Equipment: Dental handpieces, high-speed centrifuges.
- Aerospace & Defense: Gyroscopes, navigation systems, and other precision instruments.
- High-Frequency Motors & Spindles: Where low vibration and high rotational accuracy are mandatory.
