S71909 ACEGA/P4A
Sealed 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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S71909 ACEGA/P4A Bearing Product Overview & Core Advantages
The S71909 ACEGA/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This sealed bearing features an extra light preload (Class A) and is manufactured to P4A tolerance class, ensuring minimal runout and superior rotational precision. Its 25° contact angle is optimized to handle combined loads—significant radial and axial loads simultaneously. The phenolic cage and universal matchable (SU) designation make it ideal for high-speed, high-rigidity arrangements in precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S71909 | Bearing series and size designation (45mm bore, 68mm OD, 12mm width) |
| AC | 25° contact angle |
| EGA | Sealed on both sides with prelubrication |
| P4A | High precision tolerance class (superior to ABEC 7) |
S71909 ACEGA/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0), this bearing delivers exceptional running accuracy and system rigidity. The extra light preload (Class A) minimizes deflection under load while maintaining smooth operation.
Optimized Load Capacity: With a 25° contact angle and 21 chrome steel balls of 6.35mm diameter, the bearing efficiently handles combined radial and axial loads, featuring dynamic load rating of 2194 lbf and static load rating of 1440 lbf.
High-Speed Performance: The phenolic resin cage enables superior high-speed operation up to 41,000 rpm, reducing friction and centrifugal forces while maintaining dimensional stability.
Maintenance-Free Operation: Integrated seals provide effective contamination protection, while factory-applied grease lubrication ensures long-term performance across a wide temperature range (-30°C to 110°C) without requiring relubrication.
S71909 ACEGA/P4A Bearing Typical Application Areas
- Machine tool spindles and high-precision machining centers
- High-speed motors and precision gearboxes
- Medical equipment and dental handpieces
- Aerospace components and navigation systems
- Robotic joints and automation systems
- Precision measuring instruments and optical equipment
