7002 CDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7002 CDGB/P4A Bearing Product Overview & Core Advantages
The 7002 CDGB/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a universally matchable (SU) single bearing, it is supplied pre-lubricated and can be mounted in pairs to form a duplex arrangement, enabling it to accommodate combined loads (radial and axial) simultaneously. Its defining features include a P4A super-precision tolerance class, a light preload (Class B), and a phenolic cage, making it an ideal solution for high-speed spindles and other high-performance machinery where rotational accuracy and stability are paramount.
7002 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7002 | Standard bearing series designation, indicating a 15mm bore, 32mm OD, and 9mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| DGB | Indicates a Universal Matchable (SU) bearing supplied with a Light Preload (Class B). Two such bearings can be mounted together in any arrangement (back-to-back, face-to-face, or tandem). |
| P4A | Denotes an ABEC 7 / ISO P4 super-precision tolerance class, ensuring extremely tight dimensional and running accuracy for superior performance. |
7002 CDGB/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design and 15° contact angle provide high rigidity, enabling the bearing to effectively handle combined radial and axial loads. When mounted in pairs, this rigidity is significantly enhanced.
High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry and pre-lubrication contribute to a high limiting speed of 100,000 rpm, making it a true high-speed bearing.
Precision and Stability: Manufactured to P4A tolerance standards with a light preload, this bearing minimizes runout and ensures smooth, precise rotation with minimal vibration, which is critical for precision machining and instrumentation.
Material Quality: Constructed from chrome steel for both rings and balls, the bearing offers high durability and resistance to wear, ensuring a long service life under demanding conditions.
7002 CDGB/P4A Bearing Typical Application Areas
The 7002 CDGB/P4A is engineered for high-performance applications, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Instrumentation
- High-Frequency Motors
- Dental Handpieces
- Aerospace Actuators and Control Systems
