7204 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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7204 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7204 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads (radial and axial) simultaneously, this bearing features a 15° contact angle and P4A super-precision tolerance for superior running accuracy. Its ceramic ball construction and phenolic cage enable outstanding high-speed capabilities up to 100,500 rpm, while the universal matching (SU) designation allows for flexible mounting configurations in preloaded sets. This bearing represents the optimal solution for applications demanding maximum rigidity, minimal vibration, and extended service life.
7204 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7204 | Basic bearing series: 20mm bore, 47mm OD, 14mm width |
| CD | 15° contact angle design |
| GA | Universal matching bearing (SU designation) |
| HC | Hybrid ceramic construction (steel rings with ceramic balls) |
| P4A | Super precision tolerance class (ABEC 7/ISO P4 equivalent) |
7204 CDGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings with silicon nitride ceramic balls significantly reduces centrifugal forces, enabling higher operating speeds while providing excellent electrical insulation properties and superior corrosion resistance.
Precision Engineering: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, critical for high-speed and high-precision applications. The extra light preload (Class A) provides optimal stiffness without excessive friction.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at extreme speeds up to 100,500 rpm. The open design facilitates efficient lubrication and heat dissipation.
Universal Matching Design: As a universal matchable bearing, the 7204 CDGA/HCP4A can be mounted in various preloaded arrangements (DB, DF, DT) without selective matching, simplifying installation and maintenance procedures.
7204 CDGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning applications requiring extreme precision and rigidity
- Precision Instrumentation: Measuring equipment, optical systems, and laboratory instruments
- Semiconductor Manufacturing: Wafer handling robots, stepper motors, and precision positioning systems
- Aerospace Systems: Gyroscopes, navigation equipment, and auxiliary power units
- High-Speed Motors: Electric vehicle traction motors, industrial spindle motors, and turbochargers
