71930 ACDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71930 ACDGA/P4A Bearing Product Overview & Core Advantages
The 71930 ACDGA/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single bearing with Universal Matchable (SU) designation, it can be precisely paired with other bearings to form optimized arrangements. Its core advantages include superior running accuracy due to P4A tolerance class, high-speed capability enabled by the phenolic cage, and the ability to accommodate combined loads through its 25° contact angle. This makes it ideal for high-performance spindles and precision machinery.
71930 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
- 71930: Basic designation indicating a metric angular contact ball bearing with 150mm bore, 210mm OD.
- ACD: Designates Angular Contact with a 25° contact angle.
- GA: Indicates a specific internal design and Extra light preload (Class A).
- P4A: Denotes a super-precision tolerance class exceeding ABEC 7 standards, ensuring minimal runout and vibration.
71930 ACDGA/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing provides exceptional running accuracy and system stiffness, crucial for precision applications.
Optimized Load Capacity: The 25° contact angle and robust construction enable it to handle significant combined radial and axial loads (Dynamic: 24,300 lbf, Static: 28,125 lbf).
High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 11,000 rpm, reducing centrifugal forces and heat generation.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be flexibly arranged in pairs or sets (e.g., in sets of 3) to achieve specific preload and stiffness requirements without selective mounting.
71930 ACDGA/P4A Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision and speed are critical:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and high-speed electric motors.
- Medical Equipment: Centrifuges and high-speed dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation equipment.
