7020 FE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7020 FE/HCP4A
Basic Information
System of measurement
Metric
Weight
1.12 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
150 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
12.7 mm
Ball quantity
27
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
9945 lbf
Radial static load rating
8775 lbf
Limiting speed
21 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
4
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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7020 FE/HCP4A Bearing Product Overview & Core Advantages
The 7020 FE/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. As a single bearing with P4A tolerance class, it delivers superior rotational precision. Its defining capability is handling combined loads—significant radial loads alongside thrust loads in one direction—thanks to its specific contact angle of 18°. The use of ceramic balls and a phenolic cage contributes to its status as a high-speed bearing, with a limiting speed of 21,000 rpm. This bearing is pre-lubricated and designed for high rigidity and reliability in precision arrangements.
7020 FE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Standard bearing series number, indicating bearing dimensions (100mm bore, 150mm OD, 24mm width). |
| FE | Indicates a specific internal design, often relating to optimized internal geometry and preload availability for enhanced stiffness. |
| HC | Hybrid Ceramic, signifying the use of ceramic balls (typically Silicon Nitride) with steel rings. |
| P4A | The tolerance class, denoting very high precision levels for bore, outer diameter, and width, superior to ABEC 7. |
7020 FE/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls reduces friction, lowers operating temperature, and significantly extends service life, especially at high speeds. This makes it an ideal high-speed bearing.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures stable operation at the limiting speed of 21,000 rpm, offering excellent strength and guidance with minimal friction.
- High Rigidity & Load Capacity: The angular contact design and availability of preload provide high system stiffness, capable of supporting a radial dynamic load rating of 9945 lbf and a radial static load rating of 8775 lbf.
- Superior Precision: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications requiring extreme accuracy.
- Optimized for Matched Sets: While supplied as a single bearing, its design allows it to be used in matched arrangements (sets of 4 are common) for complex, multi-bearing spindle configurations requiring precise preload and alignment.
7020 FE/HCP4A Bearing Typical Application Areas
This high-performance precision bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers where accuracy, rigidity, and speed are paramount.
- High-Frequency Motors and Spindles: Applications demanding minimal vibration and heat generation at extreme rotational speeds.
- Precision Instrumentation: Medical devices, semiconductor manufacturing equipment, and coordinate measuring machines.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical components requiring high reliability and performance.
