S71908 CD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71908 CD/HCP4ADBA Bearing Product Overview & Core Advantages
The S71908 CD/HCP4ADBA is a high-precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and speed capabilities. This matched set features a back-to-back (DB) arrangement, providing superior stability and the ability to withstand combined loads (radial and axial loads from both directions). Manufactured to a P4A tolerance class with a 15° contact angle and an extra light 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 further enhances its performance in high-velocity and thermally challenging environments.
S71908 CD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision angular contact ball bearing series.
- 1908: Standard dimension series; 40 mm bore, 62 mm OD, 24 mm width.
- CD: Duplex Back-to-Back (DB) arrangement. This configuration provides high rigidity and moment load capacity.
- HC: Hybrid Ceramic construction, indicating the use of ceramic balls.
- P4A: Super-precision tolerance class, exceeding ABEC 7/ISO P4 standards, ensuring extremely tight dimensional and running accuracy.
- A: Extra light preload class. This minimizes friction and heat generation, making it ideal for high-speed applications.
- DB: Duplex Back-to-Back arrangement (reiterated for clarity).
- A: Universal matching not applicable; this is a standard matched set.
S71908 CD/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) design creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise rotational alignment.
Superior High-Speed Performance: The hybrid ceramic construction (steel rings with ceramic balls) significantly reduces centrifugal forces, lowers operating temperatures, and allows for higher limiting speeds. The lightweight phenolic cage further contributes to smooth operation at high RPM.
Exceptional Load Capacity: With a 15° contact angle and optimized internal geometry, this bearing is engineered to handle significant combined radial and axial loads simultaneously.
Pre-Lubricated and Sealed: The bearing comes pre-greased for immediate operation and is sealed to protect against contamination, offering long service life with minimal maintenance in clean environments.
S71908 CD/HCP4ADBA Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for:
- Machine Tool Spindles (e.g., CNC milling, grinding, and high-speed machining centers)
- Precision Robotics and automation equipment
- High-Frequency Spindles for PCB drilling and routing
- Medical Equipment (e.g., high-speed dental handpieces, centrifuges)
- Aviation and Aerospace auxiliary systems
