S7209 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7209 CD/HCP4A Bearing Product Overview & Core Advantages
The S7209 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and reliability. 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 defining characteristics include a P4 (ABEC-7) tolerance class for superior running accuracy, a phenolic resin cage for high-speed capability, and ceramic balls that reduce weight and inertia while offering excellent performance in challenging environments. Preloaded and pre-lubricated, this bearing is supplied ready for installation, delivering high rigidity and immediate operational readiness.
S7209 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- S7: Series designation, indicating a high-performance angular contact ball bearing.
- 209: Standard dimension series; 2 for the width series, 09 for the bore diameter code (45 mm).
- CD: Contact angle of 15° and a specific internal design optimized for high rigidity and precise operation.
- HC: Denotes the use of Hybrid Ceramic components, specifically ceramic balls.
- P4: Identifies the tolerance class P4 (ABEC-7), signifying extremely tight dimensional and running accuracy.
- A: Indicates a specific preload level for optimal internal clearance and stiffness.
S7209 CD/HCP4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance class and supplied with a specified preload, this bearing ensures minimal runout and high system stiffness, which is critical for precision spindles.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density ceramic balls significantly reduces centrifugal forces, enabling a high limiting speed of 20,000 rpm.
- Enhanced Load Capacity: The 15° contact angle and robust internal geometry provide excellent radial dynamic load rating (9518 lbf) and the ability to handle substantial one-direction axial loads.
- Advanced Material Technology: Hybrid construction with steel rings and ceramic balls offers benefits including reduced friction, lower operating temperature, and extended service life, especially in lubricant-starved conditions.
- Sealed & Lubricated for Reliability: The bearing is sealed to protect against contamination and is pre-lubricated, ensuring immediate and reliable operation within a temperature range of -30° to 110 °C.
S7209 CD/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and auxiliary power units.
- Medical Equipment: Dental handpieces and high-speed centrifuges.
