7217 ACDGA/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7217 ACDGA/P4A Bearing Product Overview & Core Advantages
The 7217 ACDGA/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to accommodate combined radial and axial loads simultaneously, this bearing features a 25° contact angle and an Extra Light (A) preload, making it ideal for high-speed spindles and precision machinery. Manufactured to the stringent P4A tolerance class, it ensures minimal runout and superior performance in critical applications. Its Universal Matchable (SU) designation allows for precise axial preload adjustment when mounted with other bearings from the same manufacturing lot.
7217 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
| 7217 | Basic bearing series: 85 mm bore, 150 mm OD, 28 mm width |
| AC | Angular Contact design with 25° contact angle |
| D | High ball count and optimized internal geometry |
| GA | Universal Matchable bearing for preload adjustment |
| P4A | Super precision tolerance class (better than ABEC 7) |
7217 ACDGA/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional running accuracy and minimal vibration.
High-Speed Capability: The phenolic resin cage and optimized internal design enable a limiting speed of 17,000 rpm, making it suitable for high-speed spindle applications.
Superior Load Capacity: With a radial dynamic load rating of 21,510 lbf and radial static load rating of 19,125 lbf, this bearing provides reliable performance under significant combined loads.
Thermal Stability: The phenolic cage material offers excellent dimensional stability across the operating temperature range of -30°C to 110°C.
Preload Optimization: The Extra Light preload (Class A) reduces deflection while maintaining low operating temperatures at high speeds.
7217 ACDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring precision and rigidity
- Precision Instrumentation: Measuring equipment and optical systems demanding minimal runout
- High-Speed Motors: Industrial spindle motors and high-RPM applications
- Aerospace Components: Guidance systems and precision mechanisms
- Medical Equipment: Dental handpieces and surgical tool spindles
