7004 FE/HCP4AH1DT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7004 FE/HCP4AH1DT
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
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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7004 FE/HCP4AH1DT Bearing Product Overview & Core Advantages
The 7004 FE/HCP4AH1DT is a precision angular contact ball bearing supplied as a matched duplex tandem (DT) set. This configuration is engineered to deliver exceptional performance in applications requiring high rigidity and the ability to accommodate significant axial loads in one direction. Manufactured to the stringent P4A tolerance class, it guarantees superior running accuracy. A key advantage is its ceramic ball construction, which contributes to reduced weight, lower friction, and suitability for high-speed operation. The bearings are preloaded and pre-lubricated, ensuring immediate operational readiness and consistent performance.
7004 FE/HCP4AH1DT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing series, indicating a 20mm bore, 42mm OD, and 24mm width. |
| FE | Designates a bearing set with a specific preload and high-precision tolerances. |
| HC | Indicates the use of Hybrid Ceramic balls (ceramic balls with steel rings). |
| P4A | The tolerance class, denoting very high precision for both dimensional and running accuracy. |
| H1 | Specifies the preload level within the matched set. |
| DT | Signifies the Duplex Tandem arrangement, where two bearings are matched to increase axial load capacity in one direction. |
7004 FE/HCP4AH1DT Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The duplex tandem (DT) arrangement combines two bearings to create a highly rigid system capable of supporting very high axial loads in one direction, in addition to radial loads. The 18° contact angle is optimized for this load combination.
- Superior High-Speed Performance: The hybrid ceramic design with silicon nitride balls significantly reduces centrifugal forces, lowers operating temperature, and allows for a higher limiting speed. The lightweight phenolic cage further enhances high-speed stability and reduces friction.
- Precision and Accuracy: Conforming to the P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications demanding high rotational accuracy.
- Optimized for Performance: The set is supplied preloaded and lubricated, eliminating the need for initial setup and ensuring consistent, reliable performance from the first rotation.
7004 FE/HCP4AH1DT Bearing Typical Application Areas
This precision matched set is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- High-Frequency Motors
- Aerospace Control Systems
