7220 ACDGA/P4
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7220 ACDGA/P4 Bearing Product Overview & Core Advantages
The 7220 ACDGA/P4 is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Designed to accommodate combined loads (radial and axial loads in one direction), this bearing features P4 precision class tolerances and an extra light preload (Class A), ensuring minimal runout and stable performance under demanding conditions. Its universal matching capability (SU designation) allows for flexible mounting arrangements in multi-bearing systems, making it ideal for high-speed spindles and precision machinery where rigidity and positioning accuracy are critical.
7220 ACDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7220 | Basic bearing series with 100mm bore, 180mm OD, 34mm width |
| AC | Angular Contact design with 25° contact angle |
| DGA | Universal Matchable (SU) bearing for flexible mounting arrangements |
| P4 | High precision tolerance class for superior running accuracy |
7220 ACDGA/P4 Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4 tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional stability and minimal vibration.
High-Speed Capability: Features a phenolic resin cage that reduces centrifugal forces and friction, enabling operation at limiting speeds up to 16,000 rpm while maintaining dimensional stability.
Superior Load Capacity: With a 25° contact angle and optimized internal geometry, this bearing delivers excellent combined load capacity (radial dynamic load rating: 33,300 lbf, static load rating: 29,025 lbf).
Universal Matching Design: The SU universal matching capability allows bearings to be mounted in various configurations (back-to-back, face-to-face, or tandem) without selective assembly, simplifying installation and maintenance.
Premium Material Construction: Manufactured from chrome steel for both rings and balls, providing high wear resistance and durability across a temperature range of -30°C to 110°C.
7220 ACDGA/P4 Bearing Typical Application Areas
Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling machines requiring high rigidity and rotational accuracy.
Precision Industrial Equipment: High-speed robotics, CNC rotary tables, and precision measuring instruments where positioning accuracy is critical.
Specialized Machinery: High-frequency motors, dental equipment, and optical instruments demanding quiet operation and minimal vibration.
Aerospace Components: Guidance systems, gyroscopes, and other precision mechanisms requiring P4 precision class performance.
