The main function of deep groove ball bearings

The main function of deep groove ball bearings is to support and reduce friction in machinery, so the accuracy and noise of deep groove ball bearings are directly related to the use and life of the machinery.
However, sales personnel often encounter some customers who use better deep groove ball bearings or imported deep groove ball bearings, but their efficiency is not high, which is related to the use and selection of deep groove ball bearings.
Some people may say that the use and selection of deep groove ball bearings is the user's business, and I only care about what the user wants and what I sell. But as a qualified salesperson, in addition to being proficient in their own product knowledge, they must also be proficient in the use of products, that is, doctor-type sales, and choose the best matching deep groove ball bearings according to the performance and use conditions of the user's matching products.