7204 ACD/P4ADBB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7204 ACD/P4ADBB
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
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
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/P4ADBB Bearing Product Overview & Core Advantages
The 7204 ACD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This metric bearing features a back-to-back (DB) matched arrangement and a P4A super-precision tolerance class, making it ideal for high-speed spindles and other demanding machinery. Its primary advantage lies in its ability to handle combined radial and axial loads simultaneously with high stability, thanks to the 25° contact angle and preloaded duplex configuration.
7204 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7204 ACD/P4ADBB is decoded as follows:
- 7204: Basic series designation for a metric angular contact ball bearing with 20mm bore, 47mm OD.
- A: Signifies a 25° contact angle, optimized for high axial load capacity.
- C: Indicates a modified internal design for enhanced performance.
- D: Denotes a duplex bearing (two bearings supplied as a set).
- P4A: The tolerance class, specifying extremely tight dimensional and running accuracy (super precision).
- DB: Specifies the back-to-back mounting arrangement, which provides high moment rigidity.
7204 ACD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and ensuring exceptional operational stability.
- Superior Load Capacity: The 25° contact angle and light preload (Class B) enable the bearing to efficiently support substantial combined radial and axial loads from both directions.
- High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, while the precision-ground chrome steel components contribute to smooth operation at the specified limiting speed of 100,500 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, OD, and width tolerances, this bearing guarantees minimal runout and vibration for high-precision applications.
7204 ACD/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for:
- Machine Tool Spindles (milling, grinding, and lathe spindles)
- High-Frequency Motors
- Precision Gearboxes
- Medical and Dental Equipment Spindles
- Aerospace Control Systems
