7004 ACE/P4ADGA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7004 ACE/P4ADGA
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
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2632 lbf
Radial static load rating
1440 lbf
Limiting speed
103 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
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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7004 ACE/P4ADGA Bearing Product Overview & Core Advantages
The 7004 ACE/P4ADGA is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Engineered to accommodate combined loads—simultaneously handling significant radial loads and axial loads in one direction—this bearing features an Extra Light (A) preload and P4A tolerance class for superior running accuracy and minimal vibration. Its universal matchable (SU) design allows for flexible mounting arrangements in pairs, providing excellent operational stability. The phenolic cage and optimized 25° contact angle contribute to its high-speed capability and smooth operation, making it ideal for precision machinery.
7004 ACE/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing series, indicating bore diameter: 20 mm, outside diameter: 42 mm, and width: 24 mm |
| ACE | 25° contact angle with Extra Light preload (Class A) |
| P4A | High-precision tolerance class (exceeding ABEC 7), ensuring tight dimensional and running accuracy |
| DGA | Universal Matchable (SU) bearing, designed for paired mounting in either DB (back-to-back) or DF (face-to-face) configurations |
7004 ACE/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The P4A tolerance class and extra light preload ensure minimal runout and vibration, providing exceptional rotational accuracy and system stiffness for demanding applications.
- Superior Load Capacity: With a 25° contact angle and optimized internal geometry, this bearing efficiently supports combined radial and axial loads. The dynamic load rating of 2632 lbf and static load rating of 1440 lbf guarantee reliable performance under stress.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 103,000 rpm. This makes it suitable for high-speed spindles and precision rotors.
- Universal Matching Capability: As a Universal Matchable (SU) bearing, two units can be paired to form a pre-loaded set, accommodating complex load conditions and simplifying installation in double-row bearing arrangements.
- Material & Lubrication: Manufactured from chrome steel for both rings and balls, it offers high wear resistance and durability. The bearing is pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
7004 ACE/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC lathes requiring high rigidity and accuracy.
- Precision Instrumentation: Measuring devices, optical scanners, and laboratory equipment where minimal vibration and runout are critical.
- High-Speed Motors & Spindles: Electric motor spindles, dental handpieces, and small turbochargers leveraging the high limiting speed.
- Robotics & Automation: Robot arm joints, precision gearboxes, and rotary tables demanding angular contact bearing performance in compact spaces.
