7004 FE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7004 FE/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.11 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
18 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2678 lbf
Radial static load rating
1508 lbf
Limiting speed
121 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
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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7004 FE/HCP4ADGA Bearing Product Overview & Core Advantages
The 7004 FE/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications. Its extra light preload (Class A) and P4A super-precision tolerance ensure exceptional running accuracy and rotational stability. A key feature is its Universal Matchable (SU) design, allowing two bearings to be universally paired for optimal performance in preloaded arrangements. The combination of a phenolic resin cage and ceramic balls enables superior high-speed performance and reduced rotational inertia.
7004 FE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| FE | Precision design with optimized internal geometry | Enhanced stiffness and reduced vibration |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Higher speed capability, longer service life, and electrical insulation |
| P4A | Super Precision Tolerance Class | Ultra-precise running accuracy for critical spindle applications |
| DGA | Contact Angle of 18° | Optimized for combined radial and axial loads |
7004 FE/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The P4A tolerance class and controlled preload deliver maximum system stiffness and minimal runout, which is critical for machining accuracy.
- Superior High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and sliding properties, while the ceramic balls reduce centrifugal forces and friction. This combination supports the high limiting speed of 121,000 rpm.
- Optimized Load Capacity: The 18° contact angle is engineered to handle combined loads efficiently, with a dynamic load rating of 2678 lbf and a static load rating of 1508 lbf.
- Universal Matching (SU): This design allows any two bearings to be mounted together in a universal arrangement (DB, DF, or DT), simplifying inventory and assembly for preloaded pairs.
7004 FE/HCP4ADGA Bearing Typical Application Areas
This bearing is engineered for high-performance machinery requiring extreme precision and speed.
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors & Spindles: Where low inertia and high rotational accuracy are paramount.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
