The needle roller and cage assembly, its cage is made of high-quality carbon steel or engineering plastics, the needle rotates smoothly in the cage and cannot drop out. Under the condition that the installation space for the bearing is limited by the user design, the needle roller and cage assembly is the best choice. Reminds you to choose this kind of bearing under the prerequisite that the shaft and hole are separately used as inner and outer raceways. For this reason, the surface accuracy of the shaft and the hole must be guaranteed.