71924 CD/P4ADGC
71900 Series Super Precision Angular Contact Ball Bearings
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71924 CD/P4ADGC Bearing Product Overview & Core Advantages
The 71924 CD/P4ADGC is a precision angular contact ball bearing designed for demanding applications requiring high rotational accuracy and rigidity. Engineered to a P4A tolerance class, it offers exceptional dimensional stability and running accuracy. Its 15° contact angle and Universal Matchable (SU) design enable it to accommodate combined radial and axial loads efficiently. This bearing is pre-lubricated and features a phenolic cage, making it suitable for high-speed operation up to 10,000 rpm, delivering reliable performance in precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71924 | Basic bearing series and size designation (120mm bore, 165mm OD, 44mm width). |
| CD | Specifies a 15° contact angle and a specific internal design optimized for high-speed performance. |
| P4A | Indicates a high-precision tolerance class, exceeding normal P4 standards, for superior running accuracy. |
| DGC | Denotes a Universal Matchable (SU) bearing, designed to be mounted in pairs (2 bearings in a set) without the need for selective mounting to achieve optimal preload. |
71924 CD/P4ADGC Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design and Moderate Preload (Class C) provide high system rigidity, enabling the bearing to effectively handle combined radial and axial loads. The robust construction with a dynamic load rating of 28,125 lbf and static load rating of 41,175 lbf ensures long-term operational reliability under significant stress.
Optimized High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces and friction, contributing to a high limiting speed of 10,000 rpm. The standard pre-lubrication ensures immediate and smooth operation at startup.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing guarantees exceptional running accuracy and minimal vibration, which is critical for precision spindles.
Simplified Installation: The Universal Matchable (SU) feature allows for direct pairing of two bearings without complex selection processes, simplifying assembly and ensuring consistent, pre-determined preload in the application.
71924 CD/P4ADGC Bearing Typical Application Areas
The 71924 CD/P4ADGC is ideally suited for high-precision, high-speed machinery where accuracy and rigidity are paramount. Key application areas include:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Instrumentation and measuring equipment
- Aerospace Positioning Systems
- Medical Equipment such as high-speed dental handpieces and scanners
