71915 CD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71915 CD/P4ADGB Bearing Product Overview & Core Advantages
The 71915 CD/P4ADGB is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universally matchable (SU) bearing supplied in a pre-loaded pair (Light / Class B), it is engineered to handle combined loads—simultaneously supporting high radial loads and axial loads in one direction. Its P4A tolerance class ensures ultra-precise running accuracy, making it ideal for high-speed spindles and other critical machinery where high rigidity and minimal runout are paramount.
71915 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71915 | Basic bearing series, indicating a 75mm bore, 105mm OD, and 32mm width. |
| CD | Indicates a universally matchable (SU) design. Two bearings with this suffix can be mounted together in any combination (face-to-face, back-to-back, or tandem) to achieve the desired preload and rigidity. |
| P4A | Denotes an ultra-precision tolerance class exceeding ABEC 7 (P4), with additional specifications for running accuracy. |
| DGB | Signifies a light preload (Class B) applied to the bearing pair. This pre-set internal load increases system stiffness and improves rotational accuracy. |
71915 CD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The 15° contact angle and universal matchable (SU) pairing are optimized to provide high system rigidity. This configuration enables the bearing set to withstand significant combined radial and axial loads, ensuring stable performance under demanding operating conditions.
Super-Precision Performance: Manufactured to P4A tolerance standards, this bearing guarantees extremely tight dimensional and running accuracy. This is critical for applications requiring minimal vibration and high positional precision.
High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 36,000 rpm. This makes the bearing suitable for very high-speed applications.
Optimized for Matched Sets: The CD universal matching feature provides flexibility in mounting arrangements, allowing engineers to configure bearing pairs to achieve specific preload and stiffness characteristics without selective assembly.
71915 CD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, precision grinding, and other high-accuracy machining operations.
- High-Frequency Motors: Spindles for routers and other high-RPM electric motors.
- Medical Equipment: High-speed rotors in dental handpieces and centrifuges.
- Aerospace Instrumentation: Gyroscopes and other precision navigation systems.
