71905 CD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71905 CD/P4ADGB Bearing Product Overview & Core Advantages
The 71905 CD/P4ADGB is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing delivers superior running precision. Its universal matchable (SU) design allows for flexible mounting arrangements in pairs to support combined loads, handling both radial and axial forces efficiently. The light preload (Class B) ensures optimal stiffness and minimal deflection under operational stresses, making it ideal for high-reliability machinery.
71905 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71905 | Basic bearing series, indicating a high-precision angular contact design with 25mm bore, 42mm OD, and 18mm width. |
| CD | Specifies a 15° contact angle and optimized internal geometry for high-speed operation. |
| P4A | Indicates ultra-precision tolerance class with enhanced dimensional and running accuracy. |
| DGB | Denotes a universal matchable (SU) pairing arrangement, allowing two bearings to be mounted in either back-to-back or face-to-face configurations. |
71905 CD/P4ADGB Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage and 15° contact angle are engineered for reduced friction and centrifugal forces, enabling a limiting speed of 100,500 rpm. This makes it an exceptional high-speed bearing for demanding applications.
Superior Rigidity & Load Capacity: The precision-ground chrome steel rings and balls, combined with the light preload, provide high system stiffness. It can withstand significant combined radial and axial loads, with a dynamic load rating of 2498 lbf and static load rating of 1800 lbf.
Precision Performance: Manufactured to P4A tolerance standards with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for high-precision applications.
Optimized Internal Design: Featuring 18 precision balls of 4.762mm diameter, the bearing provides smooth operation and even load distribution across the bearing dimensions.
71905 CD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers and precision grinding spindles requiring ultra-precision and rigidity.
- Precision Instrumentation: Measuring equipment, optical scanners, and laboratory instruments where minimal deflection is critical.
- High-Speed Motors: Servo motors, spindle motors, and other high-RPM electric motors.
- Aerospace Components: Guidance systems, gyroscopes, and other critical flight control mechanisms.
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging devices requiring reliable high-speed performance.
