The importance of lubricating oil to bearings

In order to ensure the normal operation of the rolling bearing, it is necessary to have good lubrication. The rated load and the limit rotation speed of the rolling bearing are all determined under the condition that the lubrication is properly determined. The so-called lubrication is appropriate, which means that the lubricant is properly selected, the amount of the lubricant is appropriate, and the lubrication is often caused. One of the main reasons for the early damage of bearings. According to statistics, about 1/3 of the bearings are damaged due to poor lubrication.

When the rolling bearing rotates, the bearing wears and fails due to frictional resistance. The resistance to the rotation of the rolling bearing is composed of rolling friction, sliding friction and lubricant friction. Rolling friction occurs when the rolling element rolls on the bearing raceway; sliding friction occurs on the guiding surface of the rolling element in the frame, the rib guiding surface of the holding frame, and the roller end face and the ferrule rib in the roller bearing; lubrication The friction of the agent consists of the internal friction of the lubricant at the contact and the agitation and extrusion of the lubricant. Therefore, the resistance of the impedance bearing movement is the sum of the above three frictions. The purpose of lubrication is to avoid the direct contact between the raceway, the rolling element and the holding metal through the grease and its lubrication method, and reduce the frictional heat to minimize the frictional resistance, thereby reducing wear, preventing corrosion and prolonging its use. life.

About 80% of the bearings are lubricated with grease. There are many types of bearings that are sent to the user after the grease is injected into the bearing factory. Some people refer to the grease as the fifth largest part of the inner ring, outer ring, rolling element and the four major parts of the bearing. Explain the importance of grease to bearings.