71932 ACD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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71932 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 71932 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and running accuracy. This matched set back-to-back (DB) arrangement is preloaded to Extra Light / Class A specifications, ensuring high system stiffness and precise rotational performance. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads from both directions—simultaneously. Manufactured to a P4A tolerance class, this bearing is ideal for high-speed, high-precision machinery requiring superior reliability and dimensional stability.
71932 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71932 | Basic bearing series and size designation. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (two single bearings) in a Back-to-Back (DB) arrangement. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards for enhanced running accuracy. |
| DB | Specific mounting code for the Back-to-Back matched set. |
| A | Specifies the Extra Light preload applied to the matched set. |
71932 ACD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back configuration creates a large moment load capacity and exceptional system rigidity, effectively resisting overturning moments. This design is optimized to carry combined radial and thrust loads from both directions simultaneously.
Precision & High-Speed Performance: The P4A tolerance class ensures minimal runout and vibration for superior rotational accuracy. The lightweight phenolic cage and optimized internal geometry contribute to lower friction and a high limiting speed of 11,000 rpm, making it an excellent high-speed bearing.
Material & Durability: Components made from high-grade chrome steel provide high fatigue life and wear resistance. The bearing is pre-lubricated for immediate operation within a wide temperature range of -30°C to 110°C.
71932 ACD/P4ADBA Bearing Typical Application Areas
This precision duplex bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring maximum rigidity and accuracy.
- Precision Gearboxes: Especially in applications with high axial and radial loads.
- High-Frequency Motors and Spindles: Where low vibration and high-speed capability are critical.
- Industrial Pumps and Compressors: For robust performance under heavy combined loads.
