According to whether the gear can be carried and the scattered position of the gear, it can be divided into different structures such as toothless type, external tooth type, or internal tooth type.

Among them, the four-point contact ball rotary table bearing pedestal has a high static bearing capacity, and the inserted cylindrical roller rotary table bearing pedestal has a high dynamic bearing capacity. The inserted conical roller rotary table bearing pedestal can improve the bearing rigidity and rotation accuracy by applying preloads, while the three rows of cylindrical rollers cooperate with the rotary table bearing pedestal to increase the bearing pedestal height to improve the bearing capacity. The load identification has different raceways to accept, so under the same stress condition, The diameter of its bearing seat can be greatly reduced, thereby making the host machine more compact. It is a rotary table bearing seat with high load-carrying capacity.

Rotary table bearing pedestals are commonly used for large-scale rotary installation of lifting and transportation machinery, mining machinery, construction machinery, port machinery, marine machinery, and high-precision radar.