71905 CE/HCP4AQGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71905 CE/HCP4AQGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and speed capability. This universal matchable bearing features a 15° contact angle and is supplied in a set of four, allowing for flexible arrangement in duplex pairs to support combined loads. Its construction with a phenolic cage and ceramic balls enables superior high-speed performance and minimal heat generation, making it ideal for high-reliability, precision machinery.
71905 CE/HCP4AQGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71905 | Bearing series and size designation (25mm bore, 42mm OD, 36mm width) |
| CE | Contact angle of 15° |
| HC | Hybrid Ceramic (Ceramic balls with steel rings) |
| P4A | High precision tolerance class (equivalent to ABEC 7) |
| Q | Phenolic (resin) cage |
| GA | Universal matchable bearing set, preloaded in extra light (Class A) |
Structural Features and Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction and wear, enabling higher limiting speeds (83,000 rpm) and extended service life. The lower density of ceramic balls also reduces centrifugal forces, a critical factor in high-speed applications.
Phenolic Cage: The lightweight and robust phenolic cage provides excellent dimensional stability at high speeds and temperatures, contributing to smooth operation and reduced vibration.
Universal Matchability (SU): As part of a matched set of 4 bearings, the 71905 CE/HCP4AQGA can be arranged in back-to-back (DB), face-to-face (DF), or tandem (DT) configurations. This allows for precise control of preload and stiffness to optimize performance for specific combined load conditions.
High Precision (P4A): Manufactured to P4A tolerance class, this bearing ensures minimal runout and superior rotational accuracy, which is essential for applications like machine tool spindles.
71905 CE/HCP4AQGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Instruments: Measuring devices, optical scanners.
- High-Speed Motors and Drives: Servo motors, turbo-molecular pumps.
- Aerospace and Defense Systems: Gyroscopes, navigation systems.
