7222 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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7222 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 7222 ACDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered as a single bearing with an extra light preload (Class A), it delivers superior rotational precision and rigidity. Its 25° contact angle and ceramic ball construction enable it to handle significant combined loads (radial and axial) simultaneously while operating at high speeds. This bearing is universally matchable (SU), allowing for precise axial play adjustment when paired with another identical bearing, making it ideal for high-reliability, high-speed spindle applications.
7222 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- 7222: Basic series number (Bore: 110 mm, OD: 200 mm, Width: 38 mm).
- AC: Angular Contact design.
- D: High-precision design with a 25° contact angle.
- GA: Axial internal clearance specification for universal matching.
- HC: Hybrid Ceramic construction (Steel rings with Ceramic balls).
- P4A: Tolerance class P4A, denoting extremely high dimensional and running accuracy exceeding ABEC 7/ISO P4.
7222 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The angular contact design and Class A preload provide a stiff bearing system that minimizes deflection under load, ensuring exceptional running accuracy and system stability.
Superior Load Capacity: The 25° contact angle is optimized to support substantial combined radial and axial loads, making it suitable for complex loading conditions.
Enhanced High-Speed Performance: The use of ceramic balls (lower density than steel) reduces centrifugal forces, while the phenolic cage offers low weight and excellent performance at the high limiting speed of 16,250 rpm. This combination reduces friction and heat generation.
Universal Matchability: Designated as Universal Matchable (SU), two of these bearings can be paired in a duplex set to achieve a specific preload or clearance, providing flexibility in application design.
7222 ACDGA/HCP4A Bearing Typical Application Areas
The 7222 ACDGA/HCP4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Motors
- Aerospace & Defense Systems
- Medical Equipment Spindles
