S71910 CB/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71910 CB/HCP4ADBA Bearing Product Overview & Core Advantages
The S71910 CB/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 running accuracy and high rigidity. Its key advantage lies in its ability to handle combined loads—significant radial and bidirectional axial loads simultaneously. Manufactured to an ultra-precise P4A tolerance class and featuring ceramic balls, it is engineered for superior performance in high-speed and high-accuracy scenarios, offering outstanding dimensional stability and long service life.
Model Code Breakdown
- S7: High-precision bearing series.
- 1910: Standard size designation (Bore: 50mm, OD: 72mm, Width: 24mm).
- CB: Specific internal design and clearance for a duplex back-to-back (DB) arrangement.
- HC: Hybrid Ceramic construction, indicating ceramic balls with steel rings.
- P4A: Tolerance class exceeding ABEC 7/ISO P4, ensuring extreme dimensional and running accuracy.
- DB: Duplex Back-to-Back preloaded pair. This arrangement provides high moment stiffness.
- A: Extra light preload class, optimized for minimal friction and very high speeds.
S71910 CB/HCP4ADBA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds compared to all-steel equivalents. This material also provides superior resistance to wear and electrical arcing.
High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads and tilting, making it ideal for spindle applications. The 15-degree contact angle is optimized for handling high axial loads in both directions.
Super-Precision Performance: Manufactured to P4A tolerance class with a phenolic resin cage, this bearing ensures minimal vibration, exceptional running smoothness, and stable rotational accuracy, which is critical for machining finish and precision.
High-Speed Capability: The combination of ceramic balls, a lightweight phenolic cage, and extra light preload allows for a very high limiting speed of 34,000 rpm, making it a top choice for high-speed spindles.
S71910 CB/HCP4ADBA Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery requiring the utmost precision and speed.
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Motors for aerospace and robotics.
- Medical Equipment: High-speed dental handpieces and surgical tools.
