The Deep Groove Ball Bearing 628-2RS  is a specific type of bearing designed with a deep groove, rubber seals on both sides, and manufactured to a specific tolerance or precision level. The "628" represents its standardized size and dimensions within the bearing industry, while "2RS" indicates the presence of rubber seals that protect against external contaminants and help retain lubrication within the bearing. 

This type of bearing is commonly used across various industries for applications that prioritize both reliability and precision. It's often found in:

1. Precision Machinery: Utilized in machinery and equipment that requires a high level of precision, such as instruments, gauges, and certain mechanical systems where strict tolerance levels are necessary.

2. Small-Scale Automation: Employed in compact automated systems and robotics where precise, reliable movement is essential, often found in miniature actuators and precision-driven mechanisms.

3. Electronics: Utilized in specific electronic devices, small motors, and compact mechanisms where precise movement and reliable performance are necessary.

4. Hobbyist and DIY Applications: Found in hobbyist projects, DIY machinery, and model-making that demand small yet precision-driven components.

The Deep Groove Ball Bearing 628-2RS is valued for its precision, reliability, and sealing properties, making it suitable for applications requiring both accuracy and dependable performance in smaller mechanical systems and devices.