71913 CE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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71913 CE/HCP4ADBA Bearing Product Overview & Core Advantages
The 71913 CE/HCP4ADBA is a high-precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and rotational accuracy. This matched pair arrangement (Back-to-Back) provides superior stability under combined loads (radial and axial) and moments. Manufactured to a P4A tolerance class, it features ceramic balls and a phenolic cage, enabling high-speed operation and extended service life. Its compact design and pre-lubrication make it an ideal, ready-to-install solution for high-performance machinery.
71913 CE/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing series and size designation (65mm bore, 90mm OD). |
| CE | Indicates a 15° contact angle, optimized for high-speed applications requiring high rigidity. |
| HC | Hybrid Ceramic: Denotes the use of ceramic balls for reduced friction, higher speed capability, and longer life. |
| P4A | Specifies the tolerance class, indicating very high precision for runout and dimensional accuracy. |
| DB | Duplex Back-to-Back: The two bearings are matched and pre-loaded in a back-to-back arrangement to maximize system rigidity. |
| A | Specifies an Extra Light preload for minimal friction and optimal high-speed performance. |
71913 CE/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing system's rigidity and its ability to withstand combined radial and axial loads as well as overturning moments.
Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 31,000 rpm. The 15° contact angle further enhances high-speed stability.
Extended Service Life & Reliability: Hybrid ceramic construction provides excellent wear resistance and is less susceptible to lubrication starvation. The bearings are pre-lubricated and supplied as a matched set, ensuring optimal performance and simplifying installation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, ensuring predictable and precise performance in the most demanding applications.
71913 CE/HCP4ADBA Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary actuators requiring high rigidity and accuracy.
- High-Frequency Motors & Spindles: Where extreme rotational speeds and low vibration are critical.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
- Medical Equipment: Dental handpieces and high-speed surgical tools.
