7204 CDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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7204 CDGB/HCP4A Bearing Product Overview & Core Advantages
The 7204 CDGB/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and speed capability. Manufactured to P4A super-precision tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its 15° contact angle and light preload (Class B) configuration make it ideal for applications demanding high rigidity and minimal deflection under combined loads. The combination of ceramic balls and phenolic cage enables outstanding high-speed performance, while the universal matching (SU) designation allows for flexible mounting arrangements in multi-bearing systems.
7204 CDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7204 | Basic bearing series with 20mm bore diameter |
| C | 15° contact angle design |
| DGB | Universal matching bearing set (SU designation) |
| HC | Hybrid ceramic construction with steel rings and ceramic balls |
| P4A | Super precision tolerance class with enhanced running accuracy |
7204 CDGB/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride ceramic balls provides superior performance in high-speed applications, reducing centrifugal forces and operating temperatures while extending service life.
Phenolic Resin Cage: The lightweight phenolic cage offers excellent dimensional stability and strength at high rotational speeds, contributing to the bearing's exceptional limiting speed of 100,500 rpm.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore tolerance: -0.004mm to 0), ensuring minimal runout and vibration for precision applications.
Universal Matching Capability: Designed as universal matchable bearings, allowing flexible arrangement in sets of three to achieve optimal preload and stiffness in complex spindle designs.
Optimized Load Capacity: With a dynamic load rating of 2678 lbf and static load rating of 1316 lbf, this bearing provides reliable performance under combined radial and axial loads.
7204 CDGB/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, CNC milling machines, and grinding spindles
- Precision Medical Equipment: Dental handpieces, surgical tools, and laboratory instruments
- Aerospace Systems: Gyroscopes, navigation instruments, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages
- High-Speed Motors: Spindle motors, turbochargers, and specialized drive systems
