71909 CEGA/P4A
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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71909 CEGA/P4A Bearing Product Overview & Core Advantages
The 71909 CEGA/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing delivers superior dimensional stability and running precision. Its 15° contact angle is optimized to handle combined loads, efficiently supporting significant radial loads alongside axial loads in one direction. The phenolic cage and universal matchable (SU) designation make it ideal for high-precision spindle arrangements, offering high rigidity and reliable operation in demanding industrial environments.
71909 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71909 | Basic bearing series, indicating a light series angular contact bearing with 45mm bore, 68mm OD, and 12mm width. |
| CE | Contact angle designation (15°) and internal design optimized for high-speed operation. |
| GA | Indicates a universally matchable (SU) bearing that can be paired in various preload configurations. |
| P4A | Super precision tolerance class, providing extremely tight dimensional control for high-precision applications. |
71909 CEGA/P4A Bearing Structural Features & Performance Benefits
High-Precision Construction: Manufactured to P4A tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional running accuracy and minimal vibration.
Optimized Contact Angle: The 15° contact angle provides an ideal balance between radial and axial load capacity, making it suitable for applications with combined loads.
High-Speed Capability: The phenolic resin cage offers excellent dimensional stability at high speeds, contributing to the bearing's limiting speed of 41,000 rpm while reducing friction and heat generation.
Universal Matching Design: As a universally matchable (SU) bearing, the 71909 CEGA/P4A can be precisely paired with another identical bearing to achieve specific preload conditions, enhancing system rigidity and performance.
Premium Material Selection: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and long service life under demanding conditions.
71909 CEGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Spindle motors, high-frequency motors, and precision drive systems
- Aerospace Components: Gyroscopes, navigation systems, and aircraft instrumentation
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
