S71912 CB/HCP4A
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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S71912 CB/HCP4A Bearing Product Overview & Core Advantages
The S71912 CB/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. As a single-row bearing with a 15° contact angle, it is optimized to support combined loads, handling significant radial loads and axial loads in one direction simultaneously. Its standout features include a P4 (ABEC-7) tolerance class for superior running accuracy, a phenolic resin cage for high-speed capability, and ceramic balls that reduce centrifugal forces, lower operating temperatures, and extend service life. This bearing is preloaded and pre-lubricated, making it a ready-to-install solution for high-performance spindles and precision machinery.
Model Code Breakdown
- S7: Indicates a series of high-precision angular contact ball bearings.
- 1912: Denotes the size series, with a 60mm bore, 85mm OD, and 13mm width.
- C: Signifies a 15° contact angle.
- B: Indicates a moderate preload for enhanced rigidity.
- HC: Stands for Hybrid Ceramic, meaning the rolling elements are ceramic balls.
- P4: Designates the P4 (ABEC-7) tolerance class, ensuring ultra-precise dimensions and runout.
- A: Specifies that the bearing has optimized internal geometry for high-speed operation.
S71912 CB/HCP4A Bearing Structural Features & Performance Benefits
High-Speed Performance & Thermal Stability: The combination of a lightweight phenolic cage and low-density ceramic balls (Hybrid Ceramic) significantly reduces centrifugal forces and friction, enabling a high limiting speed of 26,000 rpm. This hybrid construction also provides superior thermal stability, minimizing heat generation and thermal growth.
High Rigidity and Precision: The bearing is supplied with a moderate preload (B), which eliminates internal clearance and increases system stiffness. This is critical for applications requiring high positional accuracy and resistance to deflection under load. The P4 tolerance class guarantees precise running accuracy and low vibration.
Extended Service Life and Reliability: Ceramic balls are harder and more wear-resistant than steel, and they are electrically insulating, preventing electrical arcing damage. The bearing is pre-lubricated with high-quality grease suitable for its specified temperature range (-30° to 110°C), ensuring long-term, maintenance-free operation in sealed environments.
S71912 CB/HCP4A Bearing Typical Application Areas
The S71912 CB/HCP4A is ideally suited for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and spindle drives requiring high accuracy and responsiveness.
- High-Frequency Motors and Spindles: Motors for PCB drilling and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
- Medical Equipment: Centrifuges and other high-speed laboratory apparatus.
