71913 CDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71913 CDGB/P4A Bearing Product Overview & Core Advantages
The 71913 CDGB/P4A is a super-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Manufactured to ABEC 7 / P4A tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its 15° contact angle is optimized to handle significant combined loads—both radial and axial—simultaneously. The phenolic cage and universal matching (SU) designation make it ideal for high-speed spindle arrangements, ensuring reliable performance in precision machinery.
71913 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing series and size designation (65mm bore, 90mm OD, 13mm width). |
| C | 15° nominal contact angle. |
| D | High-precision manufacturing tolerances. |
| G | Universal Matchable (SU) bearing for preloaded duplex sets. |
| B | Light preload / Class B. |
| P4A | ABEC 7 / ISO P4A tolerance class, denoting superior dimensional and running accuracy. |
71913 CDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and light preload provide high system rigidity, enabling the bearing to support substantial combined radial and axial loads with minimal deflection.
- Super-Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0), ensuring exceptional running accuracy and low vibration for ultra-precise applications.
- High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, allowing for a high limiting speed of 31,000 rpm. The 15° contact angle further optimizes high-speed performance.
- Universal Matching (SU): Bearings are universally matchable, allowing for flexible mounting in duplex sets (DB, DF, DT) to achieve the required preload and stiffness without selective assembly.
- Material & Lubrication: Constructed from chrome steel for both rings and balls, offering high durability and wear resistance. The bearing is pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
71913 CDGB/P4A Bearing Typical Application Areas
The 71913 CDGB/P4A is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and high-speed electric motors.
- Medical Equipment: Dental handpieces and precision laboratory instruments.
- Aerospace & Defense: Gyroscopes, navigation systems, and other critical rotating assemblies.
