71913 CD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71913 CD/P4ADGB Bearing Product Overview & Core Advantages
The 71913 CD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, it offers superior dimensional stability and running accuracy. Its key advantage lies in its Universal Matchable (SU) design, allowing two bearings to be universally paired for optimal preload and rigidity in a back-to-back (DB) or face-to-face (DF) arrangement. This makes it ideal for supporting combined loads (radial and axial) simultaneously with high precision and reliability.
71913 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing series and size designation (65mm bore, 90mm OD, 26mm width). |
| C | 15° contact angle, optimized for high-speed applications and axial load capacity. |
| D | Indicates a Universal Matchable (SU) bearing, designed for pairing. |
| P4A | High precision tolerance class (superior to ABEC 7), ensuring minimal runout and vibration. |
| DB | Specifies a Light preload / Class B, providing high rigidity and precise shaft positioning. |
| GB | Indicates the bearing is lubricated with grease suitable for the specified temperature range. |
71913 CD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The angular contact design with a 15° contact angle and light preload (Class B) provides high system rigidity and accurate shaft guidance, minimizing deflection under load.
Superior Load Capacity: Engineered to handle significant combined radial and axial loads. The dynamic load rating of 7470 lbf and static load rating of 7538 lbf ensure reliable performance in demanding conditions.
Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 31,000 rpm. The 15° contact angle further enhances high-speed capability.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore, outside diameter, and width, guaranteeing consistent, high-precision operation.
71913 CD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme precision and rigidity.
- Precision Gearboxes: Applications demanding low noise, high speed, and accurate shaft alignment.
- High-Frequency Motors and Spindles: Where minimal runout and high rotational speeds are critical.
- Medical and Laboratory Equipment: Centrifuges and other precision instruments that operate at high speeds.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other critical rotational components.
