S71924 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71924 ACD/P4A Bearing Product Overview & Core Advantages
The S71924 ACD/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This single-row bearing features a 25° contact angle and is supplied with a P4 (ABEC-7) tolerance class, making it ideal for high-speed spindles and precision machinery. Its key advantages include the ability to accommodate combined radial and axial loads simultaneously, high operational stability due to its phenolic cage, and readiness for use with pre-applied lubrication.
S71924 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1924 | Bore diameter: 120 mm, Outside diameter: 165 mm, Width: 22 mm. |
| ACD | Contact angle of 25°. |
| P4A | Specifies a P4 (ABEC-7) tolerance class, denoting very high running accuracy. |
S71924 ACD/P4A Bearing Structural Features & Performance Benefits
High Precision and Rigidity: Manufactured to a P4 tolerance class, this bearing ensures minimal runout and vibration, critical for high-speed applications. The optimized 25° contact angle provides excellent rigidity to withstand combined loads.
High-Speed Capability: The lightweight and robust phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 7,000 rpm. This makes the bearing suitable for high-speed spindles.
Load Capacity: With a dynamic load rating of 16,380 lbf and a static load rating of 19,462 lbf, it reliably handles significant radial and axial loads in one direction.
Pre-lubricated and Sealed: The bearing is lubricated from the factory and features seals, protecting against contamination and ensuring long-term performance with minimal maintenance within its specified temperature range of -30°C to 110°C.
S71924 ACD/P4A Bearing Typical Application Areas
The S71924 ACD/P4A is engineered for high-performance applications where precision and speed are paramount. Typical uses include:
- Machine Tool Spindles (e.g., CNC milling and grinding machines)
- High-Frequency Motors
- Precision Robotics and Automation Equipment
- Medical Equipment (e.g., high-speed dental handpieces)
- Aerospace Instrumentation
