S71904 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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S71904 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The S71904 ACDGA/HCP4A is a high-precision double row angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. Engineered with a 25° contact angle and manufactured to P4A tolerance class, this bearing excels at simultaneously handling combined radial and axial loads from both directions. Its compact design, featuring a 20 mm bore and 9 mm width, provides a high load capacity in a minimal space. The use of ceramic balls and a phenolic cage contributes to its superior high-speed performance, with a limiting speed of 100,000 rpm, making it an ideal solution for high-reliability, high-rotation precision machinery.
Model Code In-Depth Explanation
| Code Segment | Technical Meaning |
|---|---|
| 71904 | Basic bearing series, indicating a double row angular contact ball bearing with a 20mm bore and 37mm outside diameter. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Double row design for high rigidity and combined load capacity. |
| GA | Universal Matchable (SU) bearing, one of a set of 4 bearings that can be universally matched for precise preload and performance. |
| HC | Hybrid Ceramic, indicating the use of ceramic balls. |
| P4A | High-Precision Tolerance Class, specifying extremely tight dimensional and running accuracy. |
S71904 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact structure provides superior rigidity, enabling the bearing to effectively support combined radial and bidirectional axial loads. With a dynamic load rating of 1287 lbf, it ensures stable operation under significant stress.
- Exceptional High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage minimizes friction and inertia, allowing for the high limiting speed of 100,000 rpm.
- Precision & Longevity: Manufactured to P4A tolerance class with an Extra light preload (Class A), this bearing guarantees smooth, quiet, and precise rotation. The sealed design with pre-applied grease lubrication protects against contamination and provides maintenance-free operation within a temperature range of -30°C to 110°C.
S71904 ACDGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles (High-speed milling and grinding)
- Precision Instrumentation and Measuring Devices
- High-Frequency Motors and Spindle Drives
- Medical Equipment and Dental Handpieces
- Aerospace Actuation Systems and Gyroscopes
