Bearings are an important component in pump mechanical equipment, playing an irreplaceable role in supporting and fixing the rotating body of the machinery, reducing friction during movement. To ensure that bearings can be used for a long time with minimal wear, we should pay attention to the maintenance and upkeep of bearings in our daily use. LIGZZ bearings have been engaged in the bearing industry for many years. Today, LIGZZ bearings will talk to you about the maintenance and upkeep of bearings.

The cleanliness has a significant impact on the lifespan and vibration noise of bearings. Before installing bearings, ensure that the installation surface and environment are clean. If there are foreign objects such as iron shavings, burrs, and dust entering the bearing, it will cause noise and vibration during operation, and even damage the raceway and rolling element. So, before installing the bearing, it needs to be cleaned. The surface of the bearing is coated with rust proof oil, and it must be carefully cleaned with clean gasoline or kerosene, and then coated with clean, high-quality or high-speed high-temperature lubricating grease before installation and use. It should be noted that fully enclosed bearings do not require cleaning or refueling. LIGZZ Li Gong Bearing provides you with professional bearing selection guidance services.

Lubrication has a crucial impact on the operation and lifespan of bearings, and special attention should be paid when selecting lubricating grease. Lubricating grease is made from base oil, thickeners, and additives. The performance of different types and different grades of lubricating grease of the same type varies greatly, and the allowable rotation limit is different. It is important to pay attention when selecting. The performance of lubricating grease is mainly determined by the base oil. Generally, low viscosity base oil is suitable for low temperature and high speed, while high viscosity base oil is suitable for high temperature and high load. Thickener also affects lubrication performance, and the water resistance of thickener determines the water resistance of lubricating grease. In principle, lubricating greases of different brands cannot be mixed, and even lubricating greases with the same thickener can have negative effects due to different additives.

When lubricating bearings, the more grease you apply, the better, which is a common misconception. Excessive grease in bearings and bearing chambers will cause excessive stirring of the grease, resulting in extremely high temperatures. The amount of lubricant filled in the bearing should fill 1/2 to 1/3 of the internal space of the bearing, and should be reduced to 1/3 at high speeds.

Some issues to pay attention to during installation and disassembly. Do not directly hammer the bearing end face and non stressed surface during installation. Use pressure blocks, sleeves, or other installation tools (fixtures) to evenly force the bearing, and do not install through rolling elements for power transmission. If lubricating oil is applied to the installation surface, it will make the installation smoother. If there is a large interference fit, the bearing should be placed in mineral oil and heated to 80-90 ℃ before installation as soon as possible. The oil temperature should be strictly controlled not to exceed 100 ℃ to prevent the tempering effect from reducing hardness and affecting size recovery. When encountering difficulties in disassembly, it is recommended that you use a disassembly tool to pull outward while carefully sprinkling hot oil onto the inner ring. Heat can cause the bearing inner ring to expand, making it easier to detach.

The radial clearance of bearings is not necessarily the smaller the better, and not all bearings require the minimum working clearance. It is necessary to choose the appropriate clearance according to the conditions. In the national standard 4604-93, the radial clearance of rolling bearings is divided into five groups -2 groups, 0 groups, 3 groups, 4 groups, and 5 groups. The clearance values are in descending order, with 0 group being the standard clearance. The basic radial clearance group is suitable for general operating conditions, conventional temperatures, and commonly used interference fits; Bearings operating under special conditions such as high temperature, high speed, low noise, and low friction should choose large radial clearance; Small radial clearance should be selected for bearings used in precision spindles and machine tool spindles; For roller bearings, a small amount of working clearance can be maintained. In addition, for separated bearings, there is no such thing as clearance; Finally, the working clearance of Koda Precision bearings after installation is smaller than the original clearance before installation, because the bearings have to withstand a certain load rotation, as well as the elastic deformation caused by bearing fit and load.