Before choosing a suitable slip ring, it is necessary to carefully check the working environment, and form clear and accurate size or style requirements for the required type of slip ring, otherwise, it will fail to install, or it will be stuck and unable to rotate after installation. Of course, the maintenance cost in the future must also be considered. The service life of different slip rings varies from millions to hundreds of millions of revolutions. The ideal service life of the entire mechanical system depends to a certain extent on the process and materials used. Under the influence of the market economy, the technology and materials used in the expensive conductive slip rings are guaranteed to a certain extent, and the service life is also long.