The outer ring of the roller bearing adopts a fully loaded cylindrical roller bearing with a thicker outer ring wall. The outer diameter surface of the roller has cylindrical and arc-shaped shapes, which can be designed to fit with the raceway surface according to the usage situation. By using this outer ring, the roller can roll directly on the raceway and can withstand heavy loads and impact loads. The combination roller bearing consists of the main roller, side roller, shaft head, and cover plate. The roller bearing is a sealed structure, filled with lubricating grease, providing long-term effective lubrication, and users can avoid lubrication. For harsh operating conditions, a channel for supplementing lubricating grease can be designed to improve the service life of bearings. Improper methods can also cause the roller bearings to heat up. Lubrication can reduce wear during component movement, ensure the accuracy of the press, and reduce energy consumption. Lubrication can be divided into thin oil lubrication, thick oil lubrication, etc.