71913 CD/P4AQBCA
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71913 CD/P4AQBCA Bearing Product Overview & Core Advantages
The 71913 CD/P4AQBCA is a high-precision quadruplex angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This metric system bearing features an Extra light (Class A) preload and is supplied as a matched set of four bearings in a Back-to-Back (QBC) arrangement. Its core advantages include superior capability to handle combined loads (radial and axial), high operational stability, and excellent performance in high-speed scenarios, making it ideal for ultra-precise and high-reliability machinery.
71913 CD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing series and size designation |
| C | 15° contact angle |
| D | Enhanced internal design for higher performance |
| P4A | High precision tolerance class (exceeding ABEC 7/ISO P4) |
| QBC | Quadruplex Back-to-Back matched arrangement |
71913 CD/P4AQBCA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The quadruplex back-to-back configuration creates an extremely rigid bearing system capable of withstanding heavy combined loads and moments. The 15° contact angle is optimized for significant axial load capacity in both directions.
High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to the high limiting speed of 31,000 rpm. The bearings are pre-lubricated for immediate operation.
Precision & Accuracy: Manufactured to P4A tolerance class with strict bore, outside diameter, and width tolerances, this set ensures minimal runout and superior rotational accuracy.
Material & Durability: Constructed from chrome steel for both rings and balls, the bearing offers high durability and a long service life under demanding conditions within its specified temperature range.
71913 CD/P4AQBCA Bearing Typical Application Areas
This precision bearing set is specifically engineered for high-end applications, including:
- High-frequency machine tool spindles
- Precision grinding machines
- High-speed robotic arms and actuators
- Advanced medical and laboratory equipment
- Aerospace positioning systems
