71924 CD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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71924 CD/P4ADBC Bearing Product Overview & Core Advantages
The 71924 CD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back arrangement provides superior stability under combined loads, effectively handling radial forces and bidirectional axial thrust. Manufactured to P4A tolerance class with a moderate preload (Class C), it delivers high running accuracy and is optimized for high-speed operation up to 10,000 rpm. Its compact design and phenolic cage make it an ideal solution for high-precision, high-reliability machinery.
71924 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71924 | Basic bearing designation indicating a high-precision angular contact bearing series with 120mm bore, 165mm OD, and 44mm width. |
| C | 15° contact angle, optimized for high-speed applications with moderate axial load capacity. |
| D | Indicates the bearing is part of a duplex pair (matched set). |
| P4A | High precision tolerance class with enhanced running accuracy and dimensional stability. |
| DB | Back-to-Back arrangement providing high moment stiffness and excellent stability under tilting moments. |
71924 CD/P4ADBC Bearing Structural Features & Performance Benefits
Duplex Back-to-Back Design: The matched pair arrangement creates a rigid bearing system that significantly increases moment stiffness and operational stability, making it ideal for applications subject to complex loading conditions.
High Load Capacity: With a dynamic radial load rating of 28,125 lbf and static radial load rating of 41,175 lbf, this bearing efficiently handles combined radial and axial loads simultaneously.
Optimized High-Speed Performance: The phenolic cage reduces centrifugal forces and friction, while the 15° contact angle and precision manufacturing enable reliable operation at limiting speeds of 10,000 rpm.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances (bore/OD: -0.004mm to 0), ensuring exceptional running accuracy and consistent performance in precision applications.
Premium Material Construction: Chrome steel rings and balls provide excellent wear resistance and fatigue life, while the phenolic cage offers superior performance at high speeds.
71924 CD/P4ADBC Bearing Typical Application Areas
The 71924 CD/P4ADBC is specifically engineered for high-precision industrial applications including:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Gearboxes - Industrial transmission systems requiring high accuracy
- High-Speed Motors - Servo motors and spindle drives
- Medical Equipment - Dental handpieces and surgical tools
- Aerospace Systems - Actuators and control surface mechanisms
- Robotics - Precision joints and articulation points
