S71908 ACE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S71908 ACE/HCP4ADBA Bearing Product Overview & Core Advantages
The S71908 ACE/HCP4ADBA is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This back-to-back (DB) matched pair configuration provides superior stability and can accommodate combined radial and axial loads from both directions. Manufactured to ABEC 7 / P4A tolerance class with an Extra Light (A) preload, it delivers high running accuracy and is optimized for high-speed operation up to 41,000 rpm. The combination of a phenolic cage and ceramic balls significantly reduces friction and heat generation, making it ideal for high-performance spindles and precision machinery.
S71908 ACE/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision bearing series with enhanced dimensional and running accuracy
- 1908: Standard size designation (40mm bore, 62mm OD, 24mm width)
- ACE: Specific internal design and clearance/preload configuration
- HC: Hybrid Ceramic construction (steel rings with ceramic balls)
- P4A: Ultra-precision tolerance class (equivalent to ABEC 7)
- DB: Duplex arrangement in Back-to-Back configuration
- A: Extra Light preload for minimal friction and high-speed capability
S71908 ACE/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The back-to-back duplex arrangement creates a wide effective spread between load centers, providing exceptional moment stiffness and operational stability under complex loading conditions.
Enhanced Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal forces) and phenolic resin cage (lightweight, self-lubricating) enables significantly higher limiting speeds compared to all-steel equivalents.
Superior Load Capacity: With a 25° contact angle and optimized raceway geometry, this bearing efficiently handles substantial combined radial and axial loads in both directions, making it suitable for applications with complex load patterns.
Precision Operation: Manufactured to P4A tolerance class with controlled bore and outside diameter tolerances (-0.004mm to 0), ensuring precise fitment and minimal runout for applications demanding high rotational accuracy.
S71908 ACE/HCP4ADBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring precision and rigidity
- Precision Instrumentation: Measuring equipment, optical scanners, and laboratory apparatus
- High-Speed Motors: Spindle motors, dental handpieces, and small precision electric motors
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages
