As a typical thin-wall deep groove ball bearing with rubber seals, the 686RS is widely applied in scenarios demanding high precision, high rotational speed, limited installation space, and lightweight design. It is well-suited for key components in medical devices, semiconductor processing equipment, and precision instrumentation, where its compact structure, reliable sealing performance, and stable operation meet strict operational requirements. Additionally, it is commonly used in small motors, model aircraft, handheld industrial tools, and miniature mechanical parts—all fields that prioritize space efficiency and lightweight solutions while requiring stable, high-speed operation.