71902 ACEGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71902 ACEGB/P4A Bearing Product Overview & Core Advantages
The 71902 ACEGB/P4A is a single row angular contact ball bearing engineered for high-precision applications. Designed to accommodate combined loads, it primarily handles thrust loads in one direction while supporting significant radial loads. Its P4A super precision tolerance class ensures exceptional running accuracy and rotational stability. This bearing is pre-lubricated and features a Universal Matchable (SU) designation, allowing it to be universally paired with another bearing of the same type to form a rigid, pre-loaded duplex set, ideal for applications demanding high rigidity and minimal axial play.
71902 ACEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Basic bearing series and size designation. |
| AC | 25° Contact Angle. |
| E | Optimized internal design for high load capacity. |
| GB | Light Preload / Class B. |
| P4A | Tolerance Class indicating super precision levels for running accuracy and dimensional stability. |
71902 ACEGB/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: The P4A tolerance class and phenolic resin cage ensure exceptional dimensional stability and smooth operation at high speeds, contributing to overall system rigidity.
- Superior Load Capacity: The 25° contact angle and optimized "E"-type internal geometry enable the bearing to support significant combined (radial and axial) loads.
- High-Speed Capability: The lightweight phenolic cage and precision-ground chrome steel components are designed for a high limiting speed of 230,000 rpm, making it a true high-speed bearing.
- Universal Matching (SU): This feature allows for simplified mounting of two bearings in a back-to-back (DB) or face-to-face (DF) arrangement to create a pre-loaded set, enhancing system stiffness and rotational accuracy.
71902 ACEGB/P4A Bearing Typical Application Areas
The 71902 ACEGB/P4A is ideally suited for high-performance machinery requiring precision and speed, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Dental and Medical Handpieces
- Aerospace Actuators and Instrumentation
