7020 ACD/HCP4AQBCB
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7020 ACD/HCP4AQBCB
Basic Information
System of measurement
Metric
Weight
4.18 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
96 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
46800 lbf
Radial static load rating
72000 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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7020 ACD/HCP4AQBCB Bearing Product Overview & Core Advantages
The 7020 ACD/HCP4AQBCB is a precision quadruplex matched set of angular contact ball bearings designed for the most demanding applications. This high-rigidity arrangement, configured in a back-to-back (QBC) quadruplex setup, is engineered to handle combined loads—significant radial and thrust loads in both directions—simultaneously. Manufactured to P4A super-precision tolerance standards and featuring a light preload (Class B), it delivers exceptional rotational accuracy, stability, and high-speed performance, making it ideal for high-precision, high-reliability machinery.
7020 ACD/HCP4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Basic bearing series, indicating a 100 mm bore and 150 mm outside diameter. |
| ACD | Angular Contact Design with a 25° contact angle. |
| HC | Hybrid Ceramic, denoting ceramic balls and steel rings. |
| P4A | The tolerance class, signifying super-precision levels for high-accuracy applications. |
| QBC | The matched arrangement: Quadruplex Back-to-Back. A set of four bearings matched for optimal load sharing and rigidity. |
7020 ACD/HCP4AQBCB Bearing Structural Features & Performance Benefits
- Unmatched Rigidity and Load Capacity: The quadruplex back-to-back (QBC) arrangement creates an extremely stiff bearing system, capable of supporting high combined loads and moments. The 25° contact angle is optimized for sustaining substantial thrust loads.
- Superior High-Speed Performance: The combination of hybrid ceramic balls (lighter and harder than steel) and a phenolic cage reduces centrifugal forces and friction, enabling a high limiting speed of 15,000 rpm. The light preload ensures smooth operation at high velocities.
- Enhanced Durability and Precision: Built to P4A precision standards with tight bearing dimensions and tolerance control. The open seal type allows for optimal lubrication management in controlled environments, maximizing performance and service life.
- Hybrid Ceramic Advantage: The ceramic ball material provides increased stiffness, lower thermal expansion, and extended service life, especially in high-speed and potentially corrosive environments.
7020 ACD/HCP4AQBCB Bearing Typical Application Areas
This precision bearing set is specifically designed for high-end industrial applications requiring maximum precision, rigidity, and speed, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- Aerospace Control Systems
- High-Speed Robotic Drives
- Advanced Medical and Laboratory Equipment
