S7003 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7003 ACDGA/P4A Bearing Product Overview & Core Advantages
The S7003 ACDGA/P4A is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a single bearing with a 25° contact angle and P4A tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its core advantage lies in its ability to accommodate combined loads—significant radial loads and thrust loads in one direction—while operating at extremely high speeds, making it an ideal choice for precision spindles and other critical machinery components.
S7003 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
- S7003: Basic model number for a 17mm bore, 35mm OD super-precision bearing.
- AC: Angular Contact design, optimized for combined loads.
- D: Signifies a duplex (universally matchable) bearing, allowing for precise preload control when paired with another bearing.
- GA: Indicates a specific preload level (Extra Light / Class A).
- P4A: Denotes an ultra-precision tolerance class superior to ABEC 7, ensuring minimal runout and vibration.
S7003 ACDGA/P4A Bearing Structural Features & Performance Benefits
The performance of the S7003 ACDGA/P4A is a direct result of its advanced construction:
- High Rigidity & Load Capacity: The 25° contact angle and robust chrome steel construction provide high resistance to deformation under load, supporting substantial radial and one-direction axial loads.
- Exceptional High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the P4A precision and optimized internal geometry contribute to a high limiting speed of 103,000 rpm.
- Thermal Stability & Durability: The phenolic cage offers excellent dimensional stability across the operating temperature range (-30°C to 110°C), ensuring consistent performance.
- Universal Matchability: Designated as Universal Matchable (SU), two bearings can be paired in a duplex set (e.g., DB or DF arrangement) to achieve a specific preload without selective mounting, simplifying installation and enhancing system rigidity.
S7003 ACDGA/P4A Bearing Typical Application Areas
This bearing is engineered for high-performance applications where speed, precision, and reliability are non-negotiable. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy servo motors.
- High-Frequency Spindles: PCB drilling and routing machines.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation instruments.
