S71922 ACB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71922 ACB/HCP4A Bearing Product Overview & Core Advantages
The S71922 ACB/HCP4A is a high-precision single-row angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. Its design is optimized to simultaneously handle combined loads (radial and axial) in one direction, making it an ideal choice for high-speed spindles and precision machinery. Key advantages include its P4 (ABEC-7) super-precision tolerance, the use of ceramic balls for reduced friction and thermal expansion, and a phenolic cage for superior high-speed capability. This combination delivers high rigidity, extended service life, and reliable operation in demanding conditions.
Model Code Breakdown
| S71922 | Basic series designation for a 110mm bore, 150mm OD, 20mm width angular contact bearing. |
| ACB | Indicates a 25° contact angle and a specific internal design optimized for high speed and high rigidity. |
| HCP4A | A combination suffix. HC denotes a phenolic resin cage. P4A signifies a P4 (ABEC-7) tolerance class with specific running accuracy requirements. The bearing is also pre-lubricated as per the specification. |
S71922 ACB/HCP4A Bearing Structural Features & Performance Benefits
High-Speed Performance: The lightweight phenolic cage (HC) and low-density ceramic balls significantly reduce centrifugal forces, enabling a high limiting speed of 12,000 rpm. This makes the bearing exceptionally suitable for high-speed machining spindles.
High Rigidity and Load Capacity: The 25° contact angle provides excellent resistance to axial loads while maintaining good radial load capacity. The super-precision P4 tolerance ensures minimal runout and vibration, contributing to superior system rigidity and machining accuracy.
Reduced Friction and Thermal Stability: Ceramic balls offer lower friction, reduced heat generation, and higher stiffness compared to steel balls. They are also electrically insulating and resistant to corrosion, enhancing reliability.
Pre-Lubricated and Sealed: The bearing comes sealed and pre-lubricated, protecting against contamination and providing long-term, maintenance-free operation within the specified temperature range.
S71922 ACB/HCP4A Bearing Typical Application Areas
The S71922 ACB/HCP4A is designed for high-performance applications where precision and speed are critical. Its primary uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy robotic arms and joints.
- High-Frequency Motors and Spindles: Motors requiring minimal vibration and high rotational accuracy.
- Medical Equipment: High-speed dental handpieces and imaging devices.
- Aerospace Instrumentation: Gyroscopes and other precision navigation systems.
