7204 ACDGB/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7204 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7204 ACDGB/P4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a single bearing from a universally matchable set, it excels at accommodating combined loads—simultaneously handling significant radial loads and axial loads in one direction. Its P4A super-precision tolerance and light preload (Class B) ensure smooth, low-vibration operation, making it ideal for high-speed spindles and other high-precision machinery where rotational accuracy is paramount.
7204 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Interpretation | Technical Significance |
|---|---|---|
| 7204 | Basic Designation | Metric series bearing with 20mm bore, 47mm OD, 14mm width. |
| AC | Angular Contact | 25° contact angle optimized for axial load capacity. |
| DGB | Universal Matchable (SU) | Can be mounted in tandem, back-to-back, or face-to-face arrangements with other bearings from the set to achieve specific stiffness and load characteristics. |
| P4A | Tolerance Class | Super precision grade, with extremely tight dimensional and running accuracy tolerances. |
7204 ACDGB/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The optimized 25° contact angle and robust construction using chrome steel rings and balls provide high resistance to deformation under combined loads, ensuring stable performance.
High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 100,500 rpm. The open design and factory lubrication facilitate optimal heat dissipation.
Precision Engineering: Manufactured to P4A tolerance class with a light preload, this bearing minimizes runout and vibration, which is critical for maintaining accuracy in high-speed and precision applications.
7204 ACDGB/P4A Bearing Typical Application Areas
The 7204 ACDGB/P4A is specified for use in high-performance machinery where precision and speed are non-negotiable. Key sectors include:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Robotic Drives
- High-Frequency Motors and Spindles
- Medical and Dental Equipment (e.g., High-speed handpieces)
- Aerospace Actuation Systems
