7002 ACDGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7002 ACDGA/P4A Bearing Product Overview & Core Advantages
The 7002 ACDGA/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Engineered to accommodate combined loads, it efficiently handles both radial loads and substantial axial loads in one direction. Manufactured to P4A tolerance class, this bearing offers superior running accuracy, low noise, and low vibration. Its extra light preload (Class A) ensures minimal starting and running torque, making it ideal for high-speed operation up to 95,000 rpm. The phenolic cage and universal matchable (SU) designation further enhance its performance in precision assemblies.
7002 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7002 | Basic bearing series and size designation (15mm bore, 32mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| DGA | Duplex arrangement, Ground preload (Face-to-Face), Extra light preload (Class A). |
| P4A | Indicates a super precision tolerance class for high running accuracy. |
7002 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4A tolerance standards with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring exceptional running accuracy and system rigidity for demanding applications.
- Optimized Load Capacity: The 25° contact angle is engineered to support significant combined radial and axial loads simultaneously, providing reliable performance under complex loading conditions.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling stable operation at limiting speeds up to 95,000 rpm. The extra light preload minimizes friction and heat generation.
- Universal Matching Capability (SU): Designed as a Universal Matchable bearing, it can be universally paired with other SU bearings in any combination (DF, DB, DT) to achieve the required preload and rigidity without selective mounting.
- Premium Material Construction: Made from chrome steel for both rings and balls, offering high hardness, durability, and resistance to wear.
7002 ACDGA/P4A Bearing Typical Application Areas
The 7002 ACDGA/P4A is specified for high-performance machinery where precision and speed are critical. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- Medical Equipment: Dental handpieces, centrifuges, and scanner assemblies.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
- High-Frequency Motors and Spindles: Where low vibration and high rotational accuracy are paramount.
