7003 ACD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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7003 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7003 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back arrangement provides superior stability and can accommodate combined radial and axial loads from both directions. Manufactured to P4A tolerance class with an extra light preload (Class A), it delivers high running accuracy and is ideally suited for high-speed spindles and other precision machinery where minimal deflection is critical.
7003 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7003 | Basic bearing series and size designation (17mm bore, 35mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (two bearings supplied as a matched set). |
| DB | Back-to-Back mounting arrangement. |
| P4A | High precision tolerance class, exceeding ABEC-7 standards. |
7003 ACD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide effective spread, significantly increasing system rigidity and moment load capacity, which is essential for minimizing shaft deflection under load.
Optimized Load Capacity: The 25° contact angle is engineered to handle significant axial loads in both directions, in addition to radial loads, making it ideal for combined loading conditions.
High-Speed Capability: The lightweight phenolic resin cage ensures excellent dimensional stability and low friction at high speeds, contributing to the bearing's high limiting speed of 115,000 rpm. The bearings are pre-lubricated for immediate operation.
Precision Performance: Manufactured to P4A tolerance class with a controlled extra light preload, this bearing set guarantees smooth, quiet, and precise operation with minimal runout, ensuring exceptional positional accuracy.
7003 ACD/P4ADBA Bearing Typical Application Areas
This high-precision duplex bearing is specifically engineered for demanding applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Where extreme accuracy and rigidity are paramount.
- High-Frequency Motors: Used in robotics and automation systems.
- Medical & Dental Equipment: Such as high-speed handpieces and scanners.
- Aerospace Instrumentation: For guidance systems and precision actuators.
