S71909 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71909 CD/HCP4A Bearing Product Overview & Core Advantages
The S71909 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This sealed bearing features a single, preloaded arrangement and is manufactured to a P4 (ABEC-7) tolerance class, ensuring minimal runout and superior rotational accuracy. Its core advantages include the ability to handle combined loads (radial and axial) efficiently, outstanding high-speed capabilities facilitated by its phenolic cage and ceramic balls, and long-term reliability due to its sealed and pre-lubricated design.
S71909 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision angular contact ball bearings. |
| 1909 | Denotes the bearing size with a 45mm bore, 68mm outside diameter, and 12mm width. |
| CD | Specifies a 15° contact angle and a preloaded duplex arrangement (in this case, a single bearing supplied preloaded). |
| HC | Refers to the hybrid ceramic construction, featuring ceramic balls for enhanced performance. |
| P4 | Specifies the tolerance class (P4 / ABEC-7), denoting very high dimensional and running accuracy. |
| A | Indicates the bearing is pre-lubricated. |
S71909 CD/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of ceramic balls significantly reduces centrifugal forces, lowers operating temperatures, and provides electrical insulation, contributing to superior high-speed performance and extended service life.
High Rigidity & Load Capacity: The 15° contact angle and preload provide high system rigidity, minimizing deflection under load. This design is optimized to handle significant combined radial and axial loads.
Optimized High-Speed Performance: The lightweight phenolic cage ensures stability and low friction at high rotational speeds, supporting the bearing's limiting speed of 24,000 rpm.
Sealed & Lubricated for Longevity: The integral seals protect against contamination, and the factory-applied lubrication ensures consistent performance across the specified temperature range (-30° to 110 °C), making it a low-maintenance solution.
S71909 CD/HCP4A Bearing Typical Application Areas
The S71909 CD/HCP4A is ideally suited for high-performance applications where precision, speed, and reliability are critical. Key industries and equipment include:
- Machine Tool Spindles
- High-Frequency Motors and Spindles
- Precision Grinding Equipment
- Robotic Drives and Actuators
- Aerospace & Defense Systems
