Deep groove ball bearing with ball mouth is a special structure bearing with ball mouth with no cage, a large number of steel balls, and a certain amount of locking of the inner and outer rings. There are two main designs: open or with guards on one or both sides. In addition, the bearings are available with or without retaining grooves. The outer ring of the open bearing has grooves, and a dust cover can also be installed. Due to the large number of balls and high bearing capacity, deep groove ball bearings are widely used in large-load transmission parts such as aviation and aerospace.