7004 ACD/P4ADBC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7004 ACD/P4ADBC
Basic Information
System of measurement
Metric
Weight
0.14 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
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3038 lbf
Radial static load rating
1834 lbf
Limiting speed
103 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
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
Price:
$ 89.07
/ each
In Stock
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7004 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7004 ACD/P4ADBC is a precision duplex pair of angular contact ball bearings, pre-configured in a Back-to-Back (DB) arrangement. This high-performance assembly is engineered to simultaneously handle significant combined loads, including radial and bidirectional axial loads. Manufactured to the stringent P4A tolerance class, it delivers exceptional running accuracy, high rigidity, and reliable operation in demanding applications. The moderate preload (Class C) ensures optimal stiffness and rotational precision right from installation, making it an ideal choice for high-speed spindles and other precision machinery.
7004 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Advantage |
|---|---|---|
| AC | Angular Contact | Designed with a 25° contact angle to efficiently support combined loads. |
| D | Duplex Back-to-Back (DB) | Two bearings are universally matched and mounted in a DB arrangement, providing high moment rigidity and excellent operational stability. |
| P4A | High Precision Tolerance Class | Exceeds ABEC-7 standards, ensuring ultra-precise running accuracy and minimal vibration for high-performance applications. |
| DBC | Duplex Back-to-Back, Moderate Preload (Class C) | Specifies the pre-set axial internal clearance and preload level for immediate, optimized performance upon installation. |
7004 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex Back-to-Back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring exceptional positional accuracy.
- Superior Load Capacity: The 25° contact angle and robust construction enable the bearing set to carry significant combined radial and axial loads from both directions simultaneously.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components contribute to smooth operation, supporting a limiting speed of 103,000 rpm.
- Precision & Longevity: Manufactured to P4A tolerances with a moderate preload, this set guarantees low noise, minimal heat generation, and extended service life in precision applications.
7004 ACD/P4ADBC Bearing Typical Application Areas
This precision duplex bearing set is ideally suited for high-performance applications requiring high speed, rigidity, and accuracy, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps & Compressors
- Medical and Laboratory Equipment
