Thrust Needle Roller Bearing

Before the thrust needle roller bearing is completely damaged, it provides the user with enough time to discover. Don't ignore the existence of this friction. It will reduce the speed of riding and make long-distance physical exertion greater and slower. If the surface roughness is fine and the lubricating oil film has an appropriate thickness, the probability of surface stress generation is quite low. This is why a suitable engine oil should be appropriately selected for lubrication. However, if the pressure load exceeds If the pu value of the oil film (fatigue load limit value, such as too high rotation speed, too high pressure impact) is exceeded, material fatigue will come sooner or later.

In order to allow the timken bearing to clamp the shaft center and prevent the occurrence of shaft sleeve friction (this phenomenon will instantly generate high temperatures on high-speed rotating machinery, causing the lubricating oil to burn out and even cause thermal expansion and jamming, causing shutdown), so the inner part of the bearing The bell and the outer bowl (also called the bearing box in the industry) use an "interference" phenomenon. In layman's terms, the shaft is larger than the inner bell, or the outer bowl is larger than the load. This interference requires a lot of force to install. Insert, and such installation requires a lot of force to knock the bearing, which will cause the bearing to be damaged during the knocking process. Therefore, large timken bearings in industry usually use heating, hydraulic jacking, etc.