71904 CEGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71904 CEGB/P4A Bearing Product Overview & Core Advantages
The 71904 CEGB/P4A is a single-row angular contact ball bearing designed for applications requiring high precision and exceptional rotational accuracy. Manufactured to P4A tolerance class, this bearing delivers superior dimensional stability and running accuracy. Its 15° contact angle is optimized to handle significant axial loads in one direction while accommodating combined radial and axial loads. The phenolic cage and factory-applied lubrication enable high-speed operation up to 100,000 rpm, making it ideal for precision spindles and high-speed machinery where rigidity and minimal vibration are critical.
71904 CEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71904 | Basic bearing designation indicating a single-row angular contact ball bearing with 20mm bore, 37mm OD, and 9mm width |
| CE | Contact angle of 15° and optimized internal design for high-speed applications |
| GB | Universal Matchable bearing designation, allowing for precise matched arrangement in sets of 2 |
| P4A | High-precision tolerance class with enhanced dimensional accuracy and running precision |
71904 CEGB/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: The P4A tolerance class ensures minimal dimensional variation and superior running accuracy, critical for high-precision applications. The bearing features tight dimensional tolerances with bore and outside diameter tolerances of -0.004mm to 0.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and reduced friction, enabling operation at limiting speeds of 100,000 rpm. The optimized internal geometry with 14 precision balls ensures smooth rotation at high velocities.
Load Capacity: With a 15° contact angle, this bearing efficiently handles substantial axial loads in one direction while supporting combined loads. The radial dynamic load rating of 1112 lbf and static load rating of 531 lbf provide reliable performance under demanding conditions.
Universal Matching Design: As a Universal Matchable (SU) bearing, it can be precisely paired with another identical bearing to form a matched set, ensuring optimal preload and performance in duplex arrangements.
71904 CEGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-speed machining centers and precision grinding spindles
- Precision Instrumentation - Measuring equipment and laboratory instruments requiring exceptional accuracy
- High-Speed Motors - Spindle motors and servo motors demanding minimal vibration
- Aerospace Components - Guidance systems and aircraft instrumentation
- Medical Equipment - Dental handpieces and surgical tool drives
- Robotics - Precision joints and articulation points in automated systems
