71913 CEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71913 CEGA/P4A Bearing Product Overview & Core Advantages
The 71913 CEGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing with an Extra Light (A) preload and P4A tolerance class, it delivers outstanding running accuracy, low heat generation, and high rigidity. Its 15° contact angle is optimized for handling combined loads, efficiently supporting substantial radial loads and axial loads in one direction. The phenolic resin cage and factory-applied lubrication enable reliable operation at high rotational speeds, making it an ideal choice for high-precision spindles and other critical machinery.
71913 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing designation, indicating a super-precision, light series angular contact ball bearing with a 65mm bore, 90mm OD, and 13mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed applications requiring high rigidity. |
| E | Indicates optimized internal geometry and enhanced design for improved performance and load capacity. |
| GA | Signifies a Universal Matchable (SU) bearing supplied with an Extra Light preload (Class A). Two bearings can be universally matched in any combination to achieve specific preload or clearance. |
| P4A | Denotes a super-precision tolerance class, with running accuracy exceeding ABEC 7 (ISO Class 4) and dimensional tolerances to ABEC 9 (ISO Class 2). This ensures minimal runout and vibration. |
71913 CEGA/P4A Bearing Structural Features & Performance Benefits
High Precision and Rigidity: Manufactured to P4A tolerance class, this bearing guarantees exceptional dimensional and running accuracy, which is critical for applications requiring minimal vibration and high positional accuracy. The 15° contact angle and optimized internal design provide high rigidity to resist deflection under load.
Superior High-Speed Capability: The lightweight phenolic resin cage (CEGA) offers excellent strength and guidance at high speeds, contributing to a low limiting speed of 32,500 rpm. The standard factory lubrication reduces friction and wear, further supporting reliable high-speed operation.
Optimized Load Capacity: Engineered to handle combined radial and axial loads simultaneously. With a dynamic load rating of 3712 lbf and a static load rating of 2745 lbf, it provides reliable performance in demanding conditions.
Universal Matching Design: The GA suffix indicates that these bearings are universally matchable. This allows for flexible mounting arrangements where two bearings can be paired in any combination (face-to-face, back-to-back, or tandem) without a loss in preload performance, simplifying inventory and assembly.
71913 CEGA/P4A Bearing Typical Application Areas
The 71913 CEGA/P4A is engineered for the most demanding high-precision and high-speed applications, including:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling spindles requiring high rigidity and precision.
- High-Speed Motors and Spindles: In applications such as PCB drilling and high-frequency motor spindles.
- Precision Instrumentation: Used in measuring equipment, optical scanners, and other devices where minimal runout is critical.
- Aerospace and Defense Systems: For gyroscopes, navigation systems, and other critical rotational components.
