7204 ACD/P4ADGC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7204 ACD/P4ADGC
Basic Information
System of measurement
Metric
Weight
0.21 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
28 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
11
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4185 lbf
Radial static load rating
2520 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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7204 ACD/P4ADGC Bearing Product Overview & Core Advantages
The 7204 ACD/P4ADGC is a high-precision double row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and rigidity. Its design enables it to simultaneously support combined loads (radial and bidirectional axial loads) efficiently. Manufactured to the stringent P4A tolerance class, this bearing offers superior running accuracy and is universally matchable (SU), allowing for flexible mounting arrangements in preloaded sets. The combination of a phenolic cage and a 25° contact angle delivers outstanding high-speed performance and operational stability, making it an ideal choice for high-reliability, precision machinery.
7204 ACD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Designates a Double Row Angular Contact ball bearing with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class exceeding ABEC 7 (ISO Class 4) standards, ensuring extremely tight dimensional and running accuracy. |
| DGC | Signifies a Moderate Preload (Class C) applied to the bearing, enhancing system rigidity and minimizing deflection under load. |
7204 ACD/P4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides a significantly wider effective load spread compared to single row bearings, resulting in superior rigidity and the ability to handle substantial combined loads and moment loads.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, minimizes friction, and contributes to the high limiting speed of 100,500 rpm. The optimized internal geometry further supports stable operation at high velocities.
- Precision & Universal Matchability: Manufactured to P4A tolerances, these bearings guarantee minimal runout and vibration. Their Universal Matchable (SU) characteristic allows any two bearings to be paired in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement without selective matching, simplifying installation and inventory.
- Preload for Enhanced Stability: The factory-applied moderate preload (Class C) eliminates internal clearance, increasing the bearing's natural frequency and providing exceptional stiffness for precise positioning applications.
7204 ACD/P4ADGC Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance machinery where accuracy, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and high-speed milling heads.
- Precision Gearboxes: In robotics, aerospace, and other high-tech transmission systems.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and small tool spindles.
- Medical and Laboratory Equipment: In centrifuges, scanners, and other precision instruments.
- Pumps and Compressors: For applications requiring high-speed and reliable operation.
