7002 CD/P4ADGA
7000 Series Super Precision Angular Contact Ball Bearings
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7002 CD/P4ADGA Bearing Product Overview & Core Advantages
The 7002 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Operating under the P4A tolerance class, this bearing delivers superior running precision. Its universal matchable (SU) design allows for flexible mounting in various configurations, such as back-to-back or face-to-face, to optimize performance for specific load conditions. The combination of a 15° contact angle and extra light preload (Class A) makes it an ideal solution for high-speed spindles and other precision machinery where minimal friction and high rotational accuracy are critical.
7002 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7002 | Basic bearing series, indicating a 15mm bore, 32mm OD, and 18mm width. |
| C | Designates a 15° contact angle. |
| D | Indicates the bearing is part of a universally matchable (SU) pair. |
| P4A | Specifies the high-precision tolerance class, exceeding standard ABEC-7/ISO P4 levels. |
| DGA | Likely refers to specific internal design features or a manufacturer-specific grouping code. |
7002 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High-Speed Capability: The phenolic resin cage and optimized internal geometry contribute to low friction and stable operation at the limiting speed of 100,000 rpm, making it a true high-speed bearing.
- Superior Rigidity and Load Capacity: The angular contact design enables the bearing to support combined loads (radial and axial loads simultaneously). The extra light preload enhances system rigidity without significantly increasing operational torque.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, ensuring minimal runout and vibration for superior positional accuracy.
- Material Quality: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and a long operational life.
7002 CD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instruments: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Motors and Spindles: Where minimal runout and high rotational accuracy are paramount.
- Medical Equipment: Dental handpieces and small, high-speed surgical tools.
