71902 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
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71902 CE/HCP4A Bearing Product Overview & Core Advantages
The 71902 CE/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and speed capability. Manufactured to P4 (ABEC-7) tolerance class, this bearing delivers superior running precision. Its 15° contact angle is optimized to handle significant axial loads in one direction while supporting combined radial and axial loads. The combination of a ceramic ball material and a phenolic resin cage enables outstanding high-speed performance and reduced rotational inertia. The bearing is pre-lubricated and available with a preload for immediate use in demanding applications.
71902 CE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| 71902 | Basic bearing series and size designation (15mm bore, 28mm OD, 7mm width). |
| CE | Indicates a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| HC | Denotes the use of hybrid ceramic balls (silicon nitride), offering reduced weight, higher stiffness, and superior performance at high speeds. |
| P4 | Specifies the P4 tolerance class (ABEC-7), ensuring extremely tight dimensional and running accuracy. |
| A | Signifies that the bearing is supplied with a preload for enhanced rigidity and precise shaft positioning. |
71902 CE/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The hybrid ceramic balls and lightweight phenolic resin cage significantly reduce centrifugal forces and friction, enabling a high limiting speed of 140,000 rpm. This makes it an ideal high-speed bearing.
- High Rigidity and Precision: Manufactured to P4 precision class and available with preload, this bearing provides exceptional running accuracy and system stiffness, minimizing deflection under load.
- Optimized Load Capacity: The 15° contact angle design provides excellent performance for applications with dominant axial loads or combined loads.
- Reduced Weight and Inertia: The use of ceramic balls lowers the overall weight and rotational mass, contributing to faster acceleration and deceleration in dynamic systems.
- Wide Temperature Range: Suitable for operation within a temperature range of -30°C to 110°C.
71902 CE/HCP4A Bearing Typical Application Areas
- High-Frequency Spindles for PCB drilling and milling
- Precision Machine Tool main shafts and ball screws
- High-Speed Motors and turbo-molecular pumps
- Medical and Dental Handpieces
- Aerospace Instrumentation and guidance systems
