S71930 CD/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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S71930 CD/HCP4A Bearing Product Overview & Core Advantages
The S71930 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. 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 core advantages stem from a P4 (ABEC-7) tolerance class, a lightweight phenolic cage, and ceramic balls, which collectively enable superior high-speed capabilities and operational rigidity. Preloaded and pre-lubricated, this bearing offers a compact, high-reliability solution for precision machinery.
S71930 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S7 | Indicates a high-precision angular contact ball bearing series. |
| 1930 | Specifies the dimensional series: 19 (width series) and 30 (bore diameter code for 150 mm). |
| CD | Signifies a 15° contact angle and a specific internal design optimized for high rigidity and speed. |
| HC | Denotes the use of hybrid ceramic balls (silicon nitride), which reduce weight and centrifugal force, enhancing high-speed performance. |
| P4 | Specifies the tolerance class P4 (ABEC-7), ensuring extremely tight dimensional and running accuracy. |
| A | Indicates that the bearing is supplied with a preload for enhanced stiffness and precise shaft positioning. |
S71930 CD/HCP4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4 tolerance standards with a preload, this bearing provides exceptional rotational accuracy and system stiffness, minimizing deflection under load.
Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and hybrid ceramic balls significantly reduces centrifugal forces and operating temperatures, enabling a high limiting speed of 7,500 rpm.
Excellent Load Capacity: With a 15° contact angle, the S71930 CD/HCP4A efficiently handles combined radial and axial loads. Its dynamic load rating of 25,650 lbf and static load rating of 29,700 lbf ensure long service life under demanding conditions.
Sealed and Lubricated for Longevity: As a sealed bearing that is pre-lubricated, it is protected from contamination and is designed for long-term, maintenance-free operation within its specified temperature range.
S71930 CD/HCP4A Bearing Typical Application Areas
The S71930 CD/HCP4A is ideally suited for high-performance applications where precision, speed, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Instrumentation: In medical devices, optical scanners, and coordinate measuring machines.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and small turbine systems.
- Aerospace and Defense Systems: In gyroscopes, navigation instruments, and auxiliary power units.
