71917 CE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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71917 CE/HCP4ADBA Bearing Product Overview & Core Advantages
The 71917 CE/HCP4ADBA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. This duplex back-to-back (DB) matched set features an Extra Light (Class A) preload, providing superior system rigidity and precise shaft positioning. Its construction with ceramic balls and a phenolic cage enables operation at high limiting speeds while managing thermal expansion. This bearing is engineered to handle combined radial and axial loads simultaneously, making it ideal for high-reliability, precision machinery.
71917 CE/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71917 | Basic bearing series and size designation (85mm bore, 120mm OD, 36mm width) |
| CE | Contact angle of 15° |
| HC | Hybrid Ceramic (Silicon Nitride) balls |
| P4A | High-Precision Tolerance Class (equivalent to ABEC 7/ISO P4) |
| DB | Duplex Back-to-Back arrangement |
| A | Extra Light Preload |
71917 CE/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The duplex back-to-back (DB) configuration with Class A preload creates a highly rigid bearing system that minimizes axial and radial play, ensuring exceptional running accuracy and stability under load.
Superior High-Speed Capability: The combination of ceramic balls (lower density, reduced centrifugal forces) and a lightweight phenolic cage significantly lowers rotational mass, enabling operation at the high limiting speed of 17,000 rpm.
Enhanced Load Capacity: The 15° contact angle is optimized to handle significant combined (radial and axial) loads efficiently, making it suitable for complex loading conditions.
Thermal Stability: Ceramic balls have a lower coefficient of thermal expansion than steel, which helps maintain preload stability and performance across the specified temperature range (-30°C to 110°C).
71917 CE/HCP4ADBA Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for demanding applications, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotics (Articulated arm joints, high-accuracy positioning systems)
- High-Frequency Motors and Spindles
- Aerospace & Defense Systems (Gyroscopes, navigation instruments)
- Medical Equipment (Dental handpieces, laboratory centrifuges)
