71948 ACD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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71948 ACD/P4ADBB Bearing Product Overview & Core Advantages
The 71948 ACD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This matched back-to-back arrangement is preloaded to Light / Class B standards, providing superior running accuracy and stability under combined loads. Its P4A tolerance class ensures ultra-precise rotational performance, making it ideal for high-speed, high-rigidity applications where minimal deflection is critical. The open design allows for optimized lubrication management in sophisticated systems.
71948 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for carrying combined radial and axial loads. |
| P4A | High-Precision Tolerance Class, specifying extremely tight dimensional and running accuracy limits for the inner and outer rings. |
| DB | Duplex Back-to-Back arrangement. This configuration provides high moment rigidity and excellent stability under complex load conditions. |
71948 ACD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) mounting creates a wide, rigid support system that effectively resists moment loads and shaft misalignment, ensuring precise shaft positioning.
Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 78,975 lbf, this bearing is engineered to handle significant combined radial and axial loads simultaneously.
High-Speed Capability: The phenolic resin cage offers low friction and excellent acceleration characteristics, contributing to a high limiting speed of 7,500 rpm. The open design facilitates efficient cooling and lubrication.
Precision Performance: Manufactured to P4A tolerance class with tight bore and OD tolerances, this bearing guarantees minimal runout and vibration for ultra-smooth operation in precision machinery.
71948 ACD/P4ADBB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- Precision Gearboxes: Industrial gearboxes and transmission systems where high load capacity and low noise are essential.
- High-Frequency Motors & Spindles: Applications demanding high rotational speeds and operational stability.
- Industrial Pumps & Compressors: For handling significant axial and radial forces in demanding fluid handling equipment.
