7020 ACB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7020 ACB/HCP4A Bearing Product Overview & Core Advantages
The 7020 ACB/HCP4A is a single-row angular contact ball bearing engineered for high-precision and high-speed applications. Its defining characteristic is the 25° contact angle, which enables it to support significant combined loads—both radial and axial—in one direction. Manufactured to P4 (ABEC-7) tolerance class, this bearing delivers exceptional running accuracy and rotational stability. The combination of a ceramic ball set and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life, making it an ideal solution for demanding, high-rigidity systems.
Model Code Breakdown
| Model Segment | Technical Meaning |
|---|---|
| 7020 | Standard bearing series designation, indicating a 100 mm bore and 150 mm outside diameter. |
| ACB | Angular Contact Bearing with a 25° contact angle. |
| HCP4A | Indicates a P4 (ABEC-7) tolerance class and that the bearing is supplied with a specific preload for immediate high-rigidity performance. |
7020 ACB/HCP4A Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The single-row design with a 25° contact angle and factory-applied preload ensures high system stiffness and precise rotational accuracy, critical for minimizing deflection under load.
Superior Load Capacity: Engineered to handle combined radial and axial loads simultaneously. With a dynamic load rating of 6322 lbf and a static load rating of 5738 lbf, it offers reliable performance in demanding conditions.
Enhanced High-Speed Performance: The lightweight phenolic resin cage and low-density ceramic balls reduce centrifugal forces, enabling a high limiting speed of 18,000 rpm. This construction minimizes heat generation and ensures stable operation at high rotational velocities.
Optimized Material Selection: The use of ceramic balls provides advantages including reduced weight, lower thermal expansion, and superior resistance to wear and corrosion compared to standard steel balls.
7020 ACB/HCP4A Bearing Typical Application Areas
The 7020 ACB/HCP4A is ideally suited for high-performance machinery requiring precision and speed, such as:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Robotic Drives and Actuators
- Aerospace Control Systems
