7020 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7020 ACE/HCP4A
Basic Information
System of measurement
Metric
Weight
1.12 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
150 mm
Outside diameter tolerance
-0.009mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
27
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
9518 lbf
Radial static load rating
8550 lbf
Limiting speed
20 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
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
Price:
$ 1159.1
/ each
In Stock
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7020 ACE/HCP4A Bearing Product Overview & Core Advantages
The 7020 ACE/HCP4A is a high-precision single row angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. Its defining feature is the 25° contact angle and P4 (ABEC-7) super-precision tolerance class, ensuring minimal runout and superior rotational accuracy. This bearing is preloaded and comes pre-lubricated, making it ready for immediate installation in high-speed, high-rigidity systems. It is specifically designed to handle combined loads, accommodating significant axial loads in one direction alongside radial loads, making it an ideal choice for critical spindle applications.
7020 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 7020 | Basic bearing series, indicating a 100 mm bore diameter, 150 mm outside diameter, and 24 mm width. |
| ACE | Signifies a 25° contact angle and that the bearing is supplied preloaded. |
| HCP4A | Indicates the P4 (ABEC-7) tolerance class and the use of a phenolic (polyamide) cage. |
7020 ACE/HCP4A Bearing Structural Features & Performance Benefits
- Super-Precision & High Rigidity: Manufactured to P4 tolerance class with a preload, this bearing provides exceptional running accuracy, minimizes deflection, and enhances system stiffness for superior performance in machining and precision applications.
- High-Speed Capability: The combination of a lightweight phenolic cage and ceramic balls reduces centrifugal forces, lowers operating temperature, and allows for a high limiting speed of 20,000 rpm.
- Advanced Material Combination: Ceramic balls (typically Silicon Nitride) paired with chrome steel rings offer advantages including reduced weight, higher stiffness, electrical insulation, and extended service life, especially in demanding environments.
- Optimized Load Capacity: The 25° contact angle is optimized to handle substantial combined loads, providing excellent resistance to both radial and single-direction axial forces.
7020 ACE/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Grinding Equipment
- High-Frequency Motors and Spindles
- Aerospace & Defense Positioning Systems
- Medical & Dental Equipment Spindles
