71924 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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71924 CD/P4ADGA Bearing Product Overview & Core Advantages
The 71924 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. This metric bearing features a universal matchable (SU) design, allowing two bearings to be paired in a back-to-back (DB) or face-to-face (DF) arrangement to handle combined loads, including significant radial and bidirectional axial loads. Manufactured to a P4A tolerance class, it offers superior running accuracy. With an extra light preload (Class A) and a 15° contact angle, it is optimized for high-speed operation and provides high system rigidity, making it ideal for high-precision spindles and machinery.
71924 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| C | 15° nominal contact angle |
| D | Optimized internal design for high rigidity and high speed |
| P4A | High precision tolerance class (equivalent to ABEC 7), with enhanced width and radial runout tolerances |
| DGA | Universal matchable bearing designation. Two bearings can be paired to handle combined loads. |
71924 CD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double-row angular contact design and universal matching capability enable the bearing to support high combined radial and axial loads from both directions, providing exceptional system stiffness.
High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and stable operation at the high limiting speed of 10,000 rpm. The 15° contact angle further optimizes it for high-speed applications.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter (120 mm), outside diameter (165 mm), and width (44 mm), ensuring precise fitment and minimal runout for accurate rotational performance.
Durability and Material Quality: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue life and resistance to wear. The open seal type allows for custom lubrication schemes to suit specific operational environments within the specified temperature range.
71924 CD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring high rigidity and speed.
- Precision Instrumentation: Measuring devices and analytical equipment where running accuracy is critical.
- High-Frequency Motors and Spindles: Applications in PCB drilling, dental handpieces, and small tool spindles.
- Robotics and Automation: High-accuracy rotary joints and arm actuators.
