71928 CDGA/P4
71900 Series Super Precision Angular Contact Ball Bearings
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71928 CDGA/P4 Bearing Product Overview & Core Advantages
The 71928 CDGA/P4 is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, this single-row bearing features an Extra Light (A) preload and a 15° contact angle, making it ideal for high-speed spindles and precision machinery. Its universal matching (SU) capability allows for flexible arrangement in sets of three to handle complex load conditions, offering superior performance in compact designs.
71928 CDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71928 | Basic bearing designation (280mm bore, 380mm OD) |
| C | 15° contact angle |
| D | Optimized internal design for high-speed operation |
| G | Universal matching bearing (SU designation) |
| A | Extra light preload class |
| /P4 | High precision tolerance class |
71928 CDGA/P4 Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic cage and optimized internal geometry enable a limiting speed of 7,500 rpm, making it suitable for high-speed applications. The 15° contact angle provides an optimal balance between radial and axial load capacity.
Precision Performance: Manufactured to P4 tolerance standards with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for precision applications.
Superior Load Capacity: With a dynamic load rating of 21,510 lbf and static load rating of 26,100 lbf, this bearing reliably handles combined loads while maintaining precision.
Thermal Stability: The phenolic cage material provides excellent dimensional stability across the operating temperature range of -30°C to 110°C.
71928 CDGA/P4 Bearing Typical Application Areas
- Machine Tool Spindles - High-speed milling and grinding applications
- Precision Rotary Tables - Indexing and positioning systems
- High-Speed Motors - Industrial spindle motors and servos
- Aerospace Components - Guidance systems and instrumentation
- Medical Equipment - CT scanners and high-precision medical devices
