S71908 CE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71908 CE/HCP4ADBA Bearing Product Overview & Core Advantages
The S71908 CE/HCP4ADBA is a super-precision angular contact ball bearing designed for the most demanding applications. This duplex back-to-back (DB) matched set delivers exceptional rotational accuracy and high rigidity. Its core advantage lies in its ability to handle combined loads (radial and axial) simultaneously while operating at very high speeds. Manufactured to ABEC 7 / P4A tolerance standards and featuring a phenolic cage with ceramic balls, it is the ideal solution for machine tool spindles and other high-performance machinery requiring maximum precision and reliability.
S71908 CE/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| 719 | Angular Contact Ball Bearing Series | Optimized for high-speed operation and combined loads. |
| 08 | Bore Diameter: 40 mm | Standardized bearing size for common shaft diameters. |
| C | 15° Contact Angle | Balanced capacity for radial and axial loads. |
| E | Optimized Internal Design | Enhanced performance and speed capability. |
| HC | Hybrid Ceramic (Silicon Nitride Balls) | Reduced friction, lower operating temperature, and extended service life. |
| P4A | High Precision Tolerance Class (ABEC 7) | Superior running accuracy for applications demanding minimal vibration and runout. |
| DB | Duplex Back-to-Back Arrangement | Provides high rigidity and can accommodate moment loads. |
| A | Extra Light Preload | Minimizes friction and heat generation for optimal high-speed performance. |
S71908 CE/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that significantly increases the bearing set's resistance to moment loads and tilting moments. This configuration is exceptionally effective at handling combined loads.
Superior High-Speed Performance: The combination of a lightweight phenolic cage and hybrid ceramic balls (lighter and harder than steel) reduces centrifugal forces and friction, enabling a very high limiting speed of 41,000 rpm. The 15° contact angle is ideal for high-speed applications where axial load is moderate.
Enhanced Precision and Longevity: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration. The ceramic balls are non-conductive and resistant to wear and corrosion, leading to a longer operational life and consistent performance under demanding conditions.
Sealed & Pre-Lubricated: The bearing is sealed and pre-lubricated with grease, protecting the precision internals from contamination and providing maintenance-free operation within the specified temperature range.
S71908 CE/HCP4ADBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving, and high-frequency motor spindles.
- High-Speed Automation: Robotic arms, CNC tool changers, and precision positioning systems.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
- Aerospace & Defense: Gyroscopes, radar systems, and other critical navigation components.
