71912 ACEGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71912 ACEGB/P4A Bearing Product Overview & Core Advantages
The 71912 ACEGB/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing that is Universal Matchable (SU), it offers outstanding versatility for preloaded arrangements. Its core advantages include the ability to handle combined loads (radial and axial) simultaneously, superior running accuracy ensured by the P4A tolerance class, and high-speed capability facilitated by its phenolic cage and optimized design.
71912 ACEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing designation (60mm bore, 85mm OD, 13mm width) |
| AC | 25° Contact Angle |
| E | Optimized internal design for high performance |
| GB | Light Preload / Class B |
| P4A | High precision tolerance class (equivalent to ABEC 7) |
71912 ACEGB/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4A tolerance standards with a 25° contact angle and light preload (GB), this bearing provides exceptional running accuracy and system rigidity, minimizing deflection under load.
High-Speed Performance: The lightweight phenolic cage ensures stable operation and low friction at high rotational speeds, supporting a limiting speed of 36,000 rpm. The open design allows for efficient lubrication management.
Superior Load Capacity: The angular contact design is engineered to support significant combined loads, including high axial loads in one direction, making it ideal for demanding applications.
Universal Matching: As a Universal Matchable (SU) bearing, two identical 71912 ACEGB/P4A bearings can be mounted together in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to achieve the required preload and stiffness.
71912 ACEGB/P4A Bearing Typical Application Areas
The 71912 ACEGB/P4A is ideally suited for high-performance machinery requiring supreme precision and speed, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Gearboxes
- High-Frequency Motors
- Medical Equipment Spindles
- Aerospace Actuators and Control Systems
