7021 ACD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7021 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7021 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched set features a Back-to-Back (DB) arrangement and an Extra Light (Class A) preload, enabling it to handle combined radial and axial loads simultaneously. Manufactured to the stringent P4A tolerance class, it delivers superior running accuracy and is ideally suited for high-speed, high-precision machinery where maximum system rigidity and minimal runout are critical.
Model Code Breakdown
- 7021: Basic designation denoting a 105 mm bore and 160 mm outside diameter.
- A: Signifies a 25° contact angle, optimized for carrying significant axial loads.
- CD: Indicates a Duplex Back-to-Back (DB) arrangement of two matched bearings.
- P4A: Denotes a super-precision tolerance class for exceptional dimensional and running accuracy.
- DB: Confirms the Back-to-Back mounting of the bearing pair.
- A: Specifies the Extra Light preload level within the matched set.
7021 ACD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex Back-to-Back (DB) design provides a rigid bearing arrangement that can withstand combined loads and moment loads effectively. The 25° contact angle is engineered for optimal axial load carrying capacity.
Precision Performance: Manufactured to P4A tolerance standards, this bearing ensures minimal vibration and high positional accuracy. The phenolic resin cage offers low weight and excellent performance at high speeds.
High-Speed Capability: With a limiting speed of 16,000 rpm and a lightweight phenolic cage, this bearing is engineered for high-speed applications. The open design allows for efficient lubrication management.
Material & Construction: Made from chrome steel for both rings and balls, the bearing provides high durability and long service life under demanding operating conditions.
7021 ACD/P4ADBA Bearing Typical Application Areas
The 7021 ACD/P4ADBA is ideally suited for high-precision, high-speed applications including:
- Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Positioning Systems
