7004 CE/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7004 CE/P4ADBB
Basic Information
System of measurement
Metric
Weight
0.13 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
42 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2722 lbf
Radial static load rating
1508 lbf
Limiting speed
100 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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7004 CE/P4ADBB Bearing Product Overview & Core Advantages
The 7004 CE/P4ADBB is a precision angular contact ball bearing configured as a duplex back-to-back (DB) matched set. This pre-loaded pair is engineered for applications requiring exceptional rotational accuracy, high system rigidity, and the ability to handle combined loads (radial and axial). Manufactured to the stringent P4A tolerance class, it delivers superior running accuracy and is pre-lubricated for immediate use, making it ideal for high-precision, high-reliability machinery.
7004 CE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7004 CE/P4ADBB breaks down as follows:
- 7004: Standard series designation indicating a 20mm bore, 42mm OD, and 24mm width.
- C: Denotes a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- E: Identifies a high-capacity internal design, featuring larger and/or more balls to increase load ratings.
- P4A: Specifies the tolerance class, indicating very high precision for both dimensional and running accuracy.
- DB: Stands for Duplex Back-to-Back arrangement. This configuration provides high rigidity against moment loads and increases axial load capacity in both directions.
- B: Indicates a Light preload (Class B) applied to the matched set, which minimizes deflection and ensures precise shaft positioning under operating conditions.
7004 CE/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Moment Load Resistance: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively counters overturning moments, ensuring stable shaft rotation and precise alignment.
- Superior Load Capacity: The high-capacity "E" design, utilizing larger balls, significantly boosts both the radial dynamic load rating (2722 lbf) and static load capacity, enabling reliable performance under demanding combined loads.
- Optimized High-Speed Performance: The 15° contact angle and lightweight phenolic resin cage reduce friction and centrifugal forces, allowing for a high limiting speed and smooth operation.
- Precision & Reliability: Manufactured to P4A tolerance class with a light preload, this bearing set guarantees minimal runout and consistent performance, critical for applications where precision is paramount.
7004 CE/P4ADBB Bearing Typical Application Areas
This bearing is ideally suited for high-precision and high-speed applications, including:
- Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors
- Medical and Dental Equipment Spindles
- High-Performance Pumps and Compressors
