S71920 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71920 CE/HCP4A Bearing Product Overview & Core Advantages
The S71920 CE/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior performance. Positioned in the P4 (ABEC-7) tolerance class, it offers exceptional dimensional accuracy and running precision. A key advantage is its ability to accommodate combined loads—simultaneously handling radial loads and substantial axial loads in one direction. The use of ceramic balls and a phenolic cage contributes to its high-speed capability, low friction, and extended service life, making it ideal for high-reliability, high-rotational-speed applications.
Model Code Breakdown
- S7: Denotes a series of high-precision angular contact ball bearings.
- 1920: Specifies the size series, with a 100 mm bore diameter, 140 mm outside diameter, and 20 mm width.
- CE: Indicates a 15° contact angle and typically refers to a specific internal design and preload level optimized for high rigidity.
- HC: Signifies the use of Hybrid Ceramic components, specifically ceramic balls.
- P4A: Defines the tolerance class P4 (ABEC-7) and likely includes additional specifications for high-precision matching.
S71920 CE/HCP4A Bearing Structural Features & Performance Benefits
The performance of the S71920 CE/HCP4A is driven by its advanced material selection and precision engineering:
- High Rigidity & Preload: The bearing is supplied with a preload, ensuring high system rigidity, minimal axial and radial play, and precise shaft positioning, which is critical for machine tool spindles.
- Superior Load Capacity: With a dynamic load rating of 8775 lbf and a static load rating of 7088 lbf, it reliably handles demanding combined load conditions.
- Exceptional High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage allows for a high limiting speed of 15,500 rpm, reducing operational temperature and energy consumption.
- Pre-Lubricated & Sealed: The bearing comes lubricated and sealed, protecting against contamination and providing maintenance-free operation within its specified temperature range of -30°C to 110°C.
S71920 CE/HCP4A Bearing Typical Application Areas
The S71920 CE/HCP4A is designed for high-performance machinery where precision and speed are paramount. Its typical applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- High-Frequency Motors and Spindles
- Precision Instrumentation and measuring equipment.
- Robotics and automated handling systems.
