7202 ACD/P4ADGB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7202 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 7202 ACD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a universally matchable (SU) bearing supplied in a pre-set pair, it is engineered to accommodate combined loads—simultaneously handling significant radial and axial loads in one direction. Its P4A tolerance class ensures ultra-precision operation, making it ideal for high-speed spindles and other high-rigidity, high-performance machinery. The phenolic cage and optimized contact angle of 25° contribute to its superior high-speed performance and smooth operation.
7202 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a universally matchable (SU) bearing. Two bearings can be paired in a back-to-back (DB) or face-to-face (DF) arrangement to handle bidirectional axial loads. |
| P4A | Denotes an ultra-precision tolerance class, exceeding ABEC 7 standards, for applications requiring minimal runout and vibration. |
| DGB | Signifies a light preload (Class B) applied to the bearing pair. This preload increases system stiffness and improves rotational accuracy. |
7202 ACD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and universal matchability allow two bearings to be mounted together, creating a system with very high rigidity capable of supporting substantial combined radial and axial loads.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the 25° contact angle provides an optimal balance between axial load capacity and speed capability, enabling a limiting speed of 95,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional control on the bore diameter, outside diameter, and width, ensuring precise fitment and minimal runout for critical applications.
- Optimized Material Selection: The use of chrome steel for both rings and balls ensures high durability and fatigue resistance, suitable for a wide operating temperature range.
7202 ACD/P4ADGB Bearing Typical Application Areas
The 7202 ACD/P4ADGB is specified for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy servo motors.
- Medical Equipment: Dental handpieces and CNC surgical devices.
- High-Frequency Motors: Spindles for PCB drilling and small precision motors.
