7022 ACDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7022 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7022 ACDGB/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a Universal Matchable (SU) bearing supplied in a set of three, it enables optimized preload configurations when mounted in tandem. Its P4A tolerance class ensures extremely tight dimensional and running accuracy, making it ideal for high-speed spindles and other precision machinery. The bearing is capable of supporting combined loads (radial and axial) simultaneously, with a 25° contact angle providing excellent axial load capacity. Pre-lubricated and featuring a phenolic cage, it offers reliable performance in demanding operational conditions.
7022 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7022 | Basic bearing series, denoting a 110 mm bore and 170 mm outside diameter. |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Duplex arrangement, Back-to-Back (DB) configuration. The "G" indicates a universal matchable bearing that can be paired in various preload arrangements. |
| P4A | Super-precision tolerance class, exceeding ABEC 7/ISO P4 standards, ensuring ultra-high running accuracy and minimal runout. |
7022 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DGB) design creates a rigid bearing system that can withstand significant combined radial and axial loads, as well as moment loads. This configuration increases system stability and is essential for applications like machine tool spindles.
- Super-Precision Performance: Manufactured to a P4A tolerance class, this bearing guarantees minimal vibration and exceptional running accuracy, which is critical for achieving high surface finish quality in machining operations.
- High-Speed Capability: The lightweight and robust phenolic resin cage ensures stable operation and reduced centrifugal forces at high speeds, contributing to the bearing's high limiting speed of 16,250 rpm.
- Optimized Internal Geometry: With a 25° contact angle, 20 precision balls, and optimized raceway geometry, the bearing provides a balanced performance for both high-speed and high-load applications.
- Universal Matching: Supplied as a Universal Matchable (SU) set, these three bearings are selectively graded to allow for precise preload control (Light / Class B in this case) when mounted in pairs, simplifying installation and ensuring consistent performance.
7022 ACDGB/P4A Bearing Typical Application Areas
The 7022 ACDGB/P4A is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Motors and Spindle Drives.
- Industrial Pumps and Compressors requiring high-speed rotation.
- Aerospace & Defense instrumentation and control systems.
