7002 CD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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7002 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7002 CD/P4ADBA is a precision angular contact ball bearing supplied as a matched duplex pair in a Back-to-Back (DB) arrangement. Engineered to P4A tolerance class, this bearing is designed for applications demanding exceptional rotational accuracy, high rigidity, and reliable performance under combined loads. Its extra light preload (Class A) ensures smooth, precise operation, making it an ideal solution for high-speed spindles and other precision machinery.
7002 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- 7002: Basic bearing series, indicating a 15mm bore and 32mm outside diameter.
- C: Denotes a 15° contact angle, optimized for handling combined radial and axial loads.
- D: Indicates the bearing is part of a matched duplex set.
- P4A: Specifies a high precision tolerance class superior to ABEC 7, ensuring minimal runout and vibration.
- DB: Defines the Back-to-Back mounting arrangement of the duplex pair, providing high moment rigidity.
- A: Signifies an Extra Light Preload for minimal friction and optimal high-speed performance.
7002 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex Back-to-Back (DB) arrangement creates a wide, stable support system that significantly increases moment stiffness and enables the bearing to handle substantial combined radial and axial loads from both directions.
Precision & High-Speed Performance: Manufactured to P4A tolerance standards with a phenolic resin cage, this bearing achieves excellent rotational accuracy and is capable of operating at limiting speeds up to 100,000 rpm. The phenolic cage offers low weight and excellent performance at high speeds.
Optimized for Precision Applications: The 15° contact angle and extra light preload are specifically chosen to minimize heat generation and power loss, which is critical for maintaining precision in high-speed, thermally sensitive environments.
7002 CD/P4ADBA Bearing Typical Application Areas
The 7002 CD/P4ADBA is ideally suited for high-precision, high-speed rotational systems, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Medical and Dental Handpieces
- Aerospace Instrumentation
