71924 CD/P4ATBTA
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71924 CD/P4ATBTA Bearing Product Overview & Core Advantages
The 71924 CD/P4ATBTA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This triplex matched set features three bearings arranged in a Back-to-Back (TBT) configuration, providing superior moment stiffness and the ability to handle combined radial and axial loads from both directions. Manufactured to P4A tolerance class with an Extra Light (Class A) preload, it is engineered for high-speed operation and long-term reliability in the most demanding precision machinery.
71924 CD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71924 | Bearing series and size designation (120mm bore, 165mm OD) |
| CD | Contact angle of 15° |
| P4A | High precision tolerance class (equivalent to ABEC 7) |
| TBT | Triplex Back-to-Back matched arrangement |
| A | Extra Light preload for minimal friction and high-speed capability |
71924 CD/P4ATBTA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The triplex back-to-back configuration creates a highly rigid bearing system capable of withstanding heavy combined loads and significant moment loads. With a radial dynamic load rating of 37,800 lbf and static load rating of 61,875 lbf, this bearing set delivers exceptional load-carrying performance.
Precision & High-Speed Performance: Manufactured to P4A tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, this bearing ensures minimal runout and vibration. The 15° contact angle and phenolic cage contribute to excellent high-speed characteristics, achieving a limiting speed of 10,000 rpm.
Optimized Material Selection: Constructed from chrome steel for both rings and balls, providing superior wear resistance and durability. The phenolic cage offers excellent dimensional stability and reduced weight for high-speed operation.
Pre-lubricated Design: Factory lubricated for immediate operation, suitable for a temperature range of -30°C to 110°C, ensuring reliable performance across various operating conditions.
71924 CD/P4ATBTA Bearing Typical Application Areas
The 71924 CD/P4ATBTA is ideally suited for high-precision applications requiring exceptional rigidity and accuracy, including:
- Machine Tool Spindles - High-speed milling and grinding spindles
- Precision Gearboxes - Industrial transmission systems
- Robotics - High-accuracy robotic arm joints and actuators
- Aerospace Components - Flight control systems and auxiliary power units
- Medical Equipment - High-speed dental handpieces and surgical tools
- Test & Measurement Equipment - Precision rotary tables and coordinate measuring machines
