7020 ACD/P4AQBCA
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7020 ACD/P4AQBCA Bearing Product Overview & Core Advantages
The 7020 ACD/P4AQBCA is a precision quadruplex matched set of angular contact ball bearings designed for the most demanding applications. This P4A tolerance class configuration, arranged in a Back-to-Back (QBC) quadruplex set, delivers exceptional system rigidity and rotational accuracy. Its core advantage lies in its ability to handle combined loads—significant radial and thrust loads—simultaneously, making it ideal for high-precision, high-stiffness machinery where minimal deflection is critical. The extra light preload (Class A) ensures smooth, precise operation from startup.
7020 ACD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
- 7020: Basic series number (Bore: 100 mm, Outside Diameter: 150 mm).
- ACD: Angular Contact design with a 25° contact angle.
- P4A: Denotes an ultra-precision tolerance class exceeding ABEC 7 (P4), with specific running accuracy requirements.
- QBC: Quadruplex Back-to-Back matched arrangement. Four bearings are selectively matched and supplied as a set to provide optimal preload and performance.
7020 ACD/P4AQBCA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection. This setup provides a high radial dynamic load rating of 46,800 lbf and a static load rating of 72,000 lbf for the set.
Precision & Speed Performance: Manufactured to P4A super-precision tolerances and featuring a lightweight, durable phenolic resin cage, this bearing set achieves a high limiting speed of 16,000 rpm. The phenolic cage reduces centrifugal forces, minimizes friction, and is suitable for high-speed operation.
Material & Construction: Constructed from high-grade chrome steel for both rings and balls, ensuring high durability and long service life under heavy loads. The set is pre-lubricated for immediate operation.
7020 ACD/P4AQBCA Bearing Typical Application Areas
This bearing is engineered for high-performance applications requiring maximum rigidity and precision, such as:
- High-speed Machine Tool Spindles
- Precision Grinding Spindles
- Aerospace & Defense Positioning Systems
- High-Rigidity Industrial Robots
