71913 FE/HCPA9ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71913 FE/HCPA9ADBA
Basic Information
System of measurement
Metric
Weight
0.34 kg
Tolerance class
PA9A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
18 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5962 lbf
Radial static load rating
5512 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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Product Overview and Core Advantages
The 71913 FE/HCPA9ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This matched duplex back-to-back (DB) arrangement provides superior high rigidity and can accommodate combined loads (radial and axial loads simultaneously). Featuring an extra light preload (Class A), ceramic balls, and a phenolic cage, it is engineered for high-speed operation and long-term reliability in precision machinery.
71913 FE/HCPA9ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| FE | Indicates a specific internal design and preload specification for this duplex bearing set. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride), which reduce friction, heat generation, and allow for higher speeds. |
| PA9A | Denotes the tolerance class PA9A, indicating extremely high precision levels for runout and dimensional accuracy. |
| DB | Specifies the Duplex Back-to-Back mounting arrangement, which provides high moment rigidity. |
| A | Indicates Extra Light Preload (Class A), minimizing friction at high speeds while maintaining shaft positioning. |
Structural Features and Performance Benefits
- High Rigidity and Stability: The duplex back-to-back (DB) arrangement of two bearings creates a wide, rigid support system that effectively resists moment loads and ensures precise shaft positioning.
- Superior High-Speed Performance: The combination of hybrid ceramic balls (lighter than steel, reducing centrifugal force) and a lightweight phenolic resin cage significantly lowers operating temperatures and allows for a high limiting speed of 36,000 rpm.
- Enhanced Load Capacity: The 18° contact angle is optimized to handle significant combined radial and axial loads, making it suitable for applications with complex loading conditions.
- Precision and Longevity: Manufactured to PA9A tolerance class, this bearing ensures minimal runout and vibration. The open design, when used with a proper lubrication system, facilitates efficient heat dissipation and contributes to a long service life.
71913 FE/HCPA9ADBA Bearing Typical Application Areas
This high-precision duplex angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Motors and Spindles: Where minimal runout and high rotational accuracy are critical.
- Aerospace and Defense Systems: Gyroscopes, navigation instruments, and other critical rotating assemblies.
