7020 ACDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7020 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7020 ACDGB/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a universal matchable (SU) single bearing, it can be paired with an identical unit to form a precisely preloaded duplex set, enabling it to handle combined loads—significant radial and axial loads in one direction. Manufactured to the stringent P4A tolerance class, it guarantees superior running accuracy and high-speed capability, making it ideal for high-performance spindles and precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Standard bore diameter (100 mm) and outside diameter (150 mm) designation. |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| DGB | Duplex arrangement, Ground Backs. Indicates the bearing is universal matchable (SU) and supplied with ground back faces for precise mounting in pairs (back-to-back, face-to-face, or tandem). |
| /P4A | Denotes a high-precision tolerance class with enhanced running accuracy and dimensional stability. |
7020 ACDGB/P4A Bearing Structural Features & Performance Benefits
The performance of the 7020 ACDGB/P4A is derived from its meticulous engineering:
- High Rigidity & Load Capacity: The 25° contact angle and robust construction enable it to support high radial loads and substantial one-direction axial loads. When mounted in a duplex pair, the system achieves high rigidity and can handle complex combined loads.
- Precision & High-Speed Performance: Manufactured to P4A tolerance standards, it ensures minimal runout and vibration. The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 16,000 rpm, making it a true high-speed bearing.
- Universal Matching Capability: As a Universal Matchable (SU) bearing, any two 7020 ACDGB/P4A bearings can be paired without selective matching, simplifying inventory and assembly while ensuring consistent, light preload (Class B) performance in the final arrangement.
- Durable Material Construction: The rings and balls are made from high-grade chrome steel, providing excellent wear resistance and fatigue life, suitable for a wide temperature range from -30°C to 110°C.
7020 ACDGB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is engineered for high-performance applications where accuracy, speed, and rigidity are paramount. Typical uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps and Compressors
- Medical and Laboratory Equipment
