71912 CEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71912 CEGA/P4A Bearing Product Overview & Core Advantages
The 71912 CEGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing delivers unmatched dimensional stability and running precision. Its 15° contact angle and extra light preload (Class A) make it ideally suited for managing combined loads, offering high rigidity and minimal rotational friction. As a Universal Matchable (SU) bearing, it can be precisely paired with a second bearing to form a pre-loaded duplex set, optimizing performance in high-precision spindles and other critical machinery.
71912 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71912 | Basic bearing series and size designation | Indicates a 60mm bore, 85mm OD, 13mm width bearing from the 719 series. |
| CE | Contact angle (15°) and internal design | Optimized for high-speed operation and combined load capacity. |
| GA | Preload level: Extra Light (Class A) | Minimizes friction and heat generation, ideal for very high speeds. |
| P4A | Tolerance class: P4A (ABEC 7 Precision) | Denotes extremely tight dimensional and running accuracy tolerances for superior performance. |
71912 CEGA/P4A Bearing Structural Features & Performance Benefits
- High-Speed Phenolic Cage: The phenolic resin cage offers excellent dimensional stability at high rotational speeds, contributing to the bearing's limiting speed of 31,000 rpm. Its lightweight nature reduces centrifugal forces and ensures smooth operation.
- Precision Ground Components: Manufactured to P4A precision standards with tight bore, OD, and width tolerances, this bearing ensures minimal runout and vibration, which is critical for high-precision applications.
- Optimized Load Capacity: With a 15° contact angle and high-grade chrome steel construction, the bearing effectively supports significant combined (radial and axial) loads, offering a dynamic load rating of 3668 lbf and a static load rating of 2655 lbf.
- Universal Matching Design (SU): This bearing is universally matchable, allowing for the creation of precisely pre-loaded duplex sets (DB, DF, DT arrangements) without selective mounting, simplifying installation and ensuring optimal system rigidity.
71912 CEGA/P4A Bearing Typical Application Areas
The 71912 CEGA/P4A is engineered for the most demanding high-speed and high-precision machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles and precision grinding quills.
- High-Frequency Motors: Spindles for routers and high-speed electric motors.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instruments.
