7204 CD/P4ADBA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7204 CD/P4ADBA
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
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
11
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4388 lbf
Radial static load rating
2610 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
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 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7204 CD/P4ADBA is a duplex pair of metric precision angular contact ball bearings, pre-configured in a Back-to-Back (DB) arrangement. This matched set is engineered to deliver exceptional rotational accuracy and high rigidity, making it ideal for applications requiring precise shaft positioning and the ability to withstand combined loads (radial and axial loads from both directions). With its P4A tolerance class and extra light preload, it is optimized for high-speed operation and demanding, high-precision environments.
7204 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7204 | Basic bearing series and size designation. | Indicates a 20mm bore, 47mm OD, and 14mm single bearing width. |
| C | 15° Contact Angle. | Optimized for high-speed performance and moderate axial load capacity. |
| D | Duplex / Matched Pair. | Two bearings are supplied as a precision-matched set. |
| DB | Back-to-Back Arrangement. | Provides high moment rigidity and stable operation under complex loads. |
| P4A | Tolerance Class (P4A). | Denotes extremely high precision with tight dimensional and running accuracy tolerances. |
| A | Extra Light Preload. | Minimizes internal clearance for superior shaft guidance and reduced vibration at high speeds. |
7204 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists overturning moments and supports substantial combined radial and axial loads from both directions.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class with an extra light preload, this bearing set ensures minimal runout and smooth operation, enabling it to achieve a high limiting speed of 100,500 rpm. The phenolic resin cage is lightweight and robust, contributing to low friction and high-speed capability.
- Superior Material Construction: Both rings and balls are made from high-grade chrome steel, providing excellent durability and fatigue life. The matched pair is supplied lubricated for immediate installation and initial operation.
- Optimized Internal Geometry: With a 15° contact angle and precisely sized balls, this bearing offers an ideal balance between axial load capacity and high-speed performance.
7204 CD/P4ADBA Bearing Typical Application Areas
The 7204 CD/P4ADBA is designed for high-performance machinery where precision and speed are critical. Key application areas include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motors
- Medical & Dental Equipment Spindles
- High-Precision Robotics
