71905 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71905 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71905 ACDGB/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This single-row bearing features a 25° contact angle and is supplied with a light preload (Class B), making it ideal for applications where high rigidity and precise rotational accuracy are paramount. Its universal matchable (SU) design allows for flexible mounting arrangements in sets to accommodate complex load conditions. The bearing comes pre-lubricated and is manufactured to the stringent P4A tolerance class, ensuring superior running performance for high-speed operation.
71905 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71905 | Basic bearing series and size designation (25mm bore, 42mm OD, 9mm width) |
| AC | Angular Contact design with a 25° contact angle |
| DGB | Universal Matchable bearing (can be paired in any combination) |
| P4A | High precision tolerance class, superior to ABEC-7 |
71905 ACDGB/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4A tolerance class with a light preload, this bearing delivers exceptional running accuracy and minimizes deflection under load, providing high system rigidity.
Optimized for Combined Loads: The 25° contact angle enables the bearing to efficiently support significant combined radial and axial loads simultaneously.
High-Speed Capability: The phenolic resin cage offers low weight and excellent sliding properties, contributing to a high limiting speed of 53,000 rpm. The optimized internal geometry further enhances high-speed performance.
Universal Matching: The Universal Matchable (SU) designation means bearings can be mounted in sets (back-to-back, face-to-face, or tandem) without selective matching, simplifying installation and improving load distribution in multi-bearing arrangements.
71905 ACDGB/P4A Bearing Typical Application Areas
The 71905 ACDGB/P4A is engineered for high-performance applications, including:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints and Servo Motors
