7205 CD/P4ADBA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
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Ball & Washer Dimensions
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Materials
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7205 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7205 CD/P4ADBA is a duplex pair of precision angular contact ball bearings in a back-to-back (DB) arrangement. This configuration is engineered to provide exceptional rigidity and the ability to withstand combined loads, including significant radial loads and axial loads from both directions. Manufactured to the stringent P4A tolerance class, it delivers ultra-high running accuracy, making it ideal for applications demanding high precision and high reliability. The bearings are pre-lubricated and feature an open design for controlled lubrication management in sophisticated systems.
Model Code Breakdown
- 7205: Basic series designation for a 25mm bore, 52mm OD angular contact ball bearing.
- C: Denotes a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- D: Indicates that this is a duplex pair of two matched bearings. P4A: Specifies the tolerance class, indicating very high precision for dimensional and running accuracy.
- DB: Defines the back-to-back arrangement. This configuration provides a wide effective spread of the load centers, offering high moment stiffness and excellent stability.
- A: Signifies an Extra Light preload. This preload eliminates internal clearance, ensuring precise shaft positioning, reduced noise, and enhanced system rigidity without generating excessive heat.
7205 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a statically determinate setup that provides superior resistance to moment loads and tilting, ensuring maximum system stiffness and operational stability.
Combined Load Capacity: The inherent design of the angular contact bearing, combined with the duplex pair, enables it to support substantial radial loads and axial loads in both directions simultaneously.
High-Speed Capability: The 15° contact angle and the lightweight, high-strength phenolic resin cage are optimized for high-speed applications, reducing centrifugal forces and friction for a higher limiting speed.
Precision Performance: Adherence to the P4A super-precision tolerance class guarantees minimal runout and vibration, which is critical for applications requiring extreme accuracy and smooth operation.
7205 CD/P4ADBA Bearing Typical Application Areas
This high-precision duplex bearing set is typically employed in demanding applications such as:
- Machine Tool Spindles (e.g., for milling, grinding, and turning centers)
- High-Frequency Motors and Spindle Drives
- Precision Gearboxes
- Robotic Arms and Rotary Tables
- Medical and Dental Equipment spindles
- Aerospace Instrumentation and control systems
