7020 ACDGA/P4AH1
7000 Series Super Precision Angular Contact Ball Bearings
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7020 ACDGA/P4AH1 Bearing Product Overview & Core Advantages
The 7020 ACDGA/P4AH1 is a single-row angular contact ball bearing designed for high-precision and high-speed applications. Engineered to accommodate combined loads, it primarily handles significant axial loads in one direction, complemented by moderate radial loads. Its defining characteristics include an extra light preload (Class A) and a P4A super-precision tolerance class, making it ideal for machine tool spindles and other demanding equipment requiring exceptional running accuracy, smooth operation, and high rigidity.
7020 ACDGA/P4AH1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Basic bearing designation indicating a 100 mm bore and 150 mm outside diameter. |
| AC | Angular Contact design with a 25° contact angle. |
| DG | Universal Matchable (SU) bearing. Two bearings can be arranged in a matched set (back-to-back, face-to-face, or tandem) to optimize performance for specific load conditions. |
| A | Signifies an Extra Light Preload (Class A), which minimizes friction and heat generation for superior high-speed operation. |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7 standards, ensuring extremely tight dimensional and running accuracy. |
| H1 | Indicates specific internal fit and clearance parameters optimized for the preload and tolerance class. |
7020 ACDGA/P4AH1 Bearing Structural Features & Performance Benefits
High-Precision Construction: Manufactured to P4A tolerance with a phenolic resin cage, this bearing ensures minimal vibration and exceptional running accuracy, which is critical for applications like machine tool spindles.
Optimized for High Speeds: The combination of the lightweight phenolic cage, extra light preload, and 25° contact angle enables a high limiting speed of 16,000 rpm, reducing centrifugal forces and operational temperatures.
Superior Load Capacity: The angular contact design and robust construction from chrome steel allow it to handle significant combined loads, particularly one-direction axial loads, with high reliability.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be paired with an identical bearing to form a precisely matched set, enhancing system rigidity and load distribution without the need for selective mounting.
7020 ACDGA/P4AH1 Bearing Typical Application Areas
The 7020 ACDGA/P4AH1 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 Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: Where minimal runout and high rotational accuracy are required.
- Medical Equipment: Dental handpieces and imaging scanner rotors.
- Aerospace Test Rigs: Precision positioning systems and gyroscopes.
