7002 CD/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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7002 CD/P4ADBB Bearing Product Overview & Core Advantages
The 7002 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This metric system bearing features a back-to-back (DB) matched arrangement and comes with a Light (Class B) preload, making it ideal for high-precision spindles and other machinery where minimal deflection under combined loads is critical. Its P4A tolerance class ensures superior running accuracy, while the phenolic cage contributes to smooth operation at high speeds.
7002 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7002 | Basic bearing series and size designation (15mm bore, 32mm OD). |
| C | Specifies a 15° contact angle, optimized for handling combined radial and axial loads. |
| D | Indicates the bearing is part of a duplex pair (two bearings). |
| P4A | Denotes a high-precision tolerance class, providing extremely tight dimensional and running accuracy. |
| DB | Specifies the back-to-back mounting arrangement, which provides high moment rigidity and stability. |
| B | Indicates the Light preload level (Class B), which minimizes axial and radial play for precise positioning. |
7002 CD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement significantly increases system rigidity, effectively resisting moment loads and maintaining shaft alignment under combined loads.
Superior Precision: Manufactured to P4A tolerance class standards, this bearing ensures minimal runout and vibration, which is essential for high-precision applications.
Optimized High-Speed Performance: The phenolic resin cage is lightweight and robust, enabling smooth operation and contributing to the high limiting speed of 100,000 rpm. The 15° contact angle provides an excellent balance for high-speed radial and axial load capacity.
Preload & Accuracy: The Light preload (Class B) eliminates internal clearance, enhancing rotational accuracy and system stiffness without generating excessive heat.
7002 CD/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for demanding applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Rotary Tables
- High-Frequency Motors
- Medical and Dental Equipment Spindles
- Optical and Measuring Instrument Rotational Units
