71910 CD/P4AQBCA
71900 Series Super Precision Angular Contact Ball Bearings
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71910 CD/P4AQBCA Bearing Product Overview & Core Advantages
The 71910 CD/P4AQBCA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This bearing is supplied as a Quadruplex Back-to-Back (QBC) matched set, providing superior stability and the ability to withstand combined loads (radial and axial). With its P4A tolerance class and extra light preload, it is engineered for high-speed operation and high-reliability scenarios where minimal runout and precise shaft positioning are critical.
71910 CD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Bearing series and size designation (50mm bore, 72mm OD). |
| C | 15° contact angle. |
| D | Indicates a matched bearing set. |
| P4A | High-precision tolerance class (exceeding ABEC 7), ensuring extremely tight dimensional and running accuracy. |
| QBC | Quadruplex Back-to-Back arrangement. Four bearings are matched and preloaded in a back-to-back configuration for maximum system rigidity. |
| A | Specifies Extra Light preload within the matched set. |
71910 CD/P4AQBCA Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The QBC arrangement creates a highly rigid bearing system that effectively resists moment loads and manages complex combined loads. This configuration significantly enhances the stiffness of the entire spindle or shaft assembly.
High-Speed Performance: The phenolic cage is lightweight and possesses excellent sliding properties, contributing to lower friction and enabling the bearing to achieve its high limiting speed of 46,000 rpm. The optimized internal geometry and 15° contact angle are ideal for high-speed applications.
Precision Engineering: Manufactured to P4A tolerance class, this bearing guarantees minimal running vibration and exceptional dimensional stability, which is paramount for achieving high levels of machining or operational accuracy.
Superior Material Quality: Constructed from chrome steel for both rings and balls, the bearing ensures high durability, long service life, and consistent performance under demanding conditions.
71910 CD/P4AQBCA Bearing Typical Application Areas
The 71910 CD/P4AQBCA is ideally suited for high-performance machinery requiring ultra-precision and high rigidity, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, precision grinding equipment.
- High-Frequency Motors: Spindles for high-RPM electric motors.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical navigation or control equipment.
