S71924 ACB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71924 ACB/P4A Bearing Product Overview & Core Advantages
The S71924 ACB/P4A is a high-precision, double row angular contact ball bearing engineered for demanding applications requiring exceptional rigidity and running accuracy. Its design enables it to simultaneously support substantial combined loads (radial and bidirectional axial loads) in a compact cross-section. Manufactured to a P4 (ABEC-7) tolerance class, this bearing is preloaded and comes sealed and pre-lubricated, ensuring high reliability, long service life, and consistent performance in high-speed, high-precision environments.
S71924 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision angular contact ball bearings. |
| 1924 | Specifies the bearing dimensions: 120mm bore, 165mm outside diameter, 22mm width. |
| ACB | Signifies a specific internal design with a 25° contact angle and preload for optimal stiffness. |
| P4A | Denotes the tolerance class P4 (ABEC-7), ensuring extremely high dimensional and running accuracy. |
S71924 ACB/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double row design and 25° contact angle provide superior high rigidity, enabling the bearing to handle significant combined loads and moment loads effectively.
Precision and High-Speed Performance: The P4 tolerance and phenolic resin cage contribute to smooth operation and low vibration at high speeds, with a limiting speed of 9,000 rpm. The optimized internal geometry ensures excellent rotational accuracy.
Sealed and Ready-to-Use: As a sealed bearing that is pre-lubricated, it is protected from contamination and is ready for immediate installation, offering a maintenance-free solution within its specified temperature range.
Durable Construction: Manufactured from chrome steel for both rings and balls, this bearing ensures high durability and a long operational lifespan under demanding conditions.
S71924 ACB/P4A Bearing Typical Application Areas
The S71924 ACB/P4A is ideally suited for high-precision machinery and equipment where accuracy, rigidity, and speed are critical. Key application areas include:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Gearboxes
- High-Frequency Motors and Spindles
- Medical and Laboratory Equipment
- Robotic Arm Joints and Precision Drives
