1、 Requirements for installation surface and installation site
If there are iron filings, burrs, dust and other foreign matters in the SKF Bearing, the SKF Bearing will produce noise and vibration during operation, and even damage the raceway and rolling element. Therefore, before installing SKF Bearing, you must Installation And Use ensure that the installation surface and installation environment are clean.
2、 SKF Bearing must be cleaned before installation
The surface of SKF Bearing is coated with antirust oil. You must carefully clean it with clean gasoline or kerosene, and then apply clean high-quality or high-speed and high-temperature lubricating grease before installation and use. Cleanliness has a great impact on SKF Bearing Life and vibration noise. However, we would like to remind you that the fully enclosed SKF Bearing does not need cleaning and refueling.
3、 Selection of lubricating grease
Lubrication has a very important impact on the operation and service life of SKF bearings. Here we briefly introduce the general principles of selecting grease. Lubricating grease is made of base oil, thickener and additives. The performance of different types and different brands of lubricating grease of the same type varies greatly, and the allowable rotation limit is different.
Pay attention to it when selecting. The performance of grease is mainly determined by the base oil. Generally, the base oil with low viscosity is suitable for low temperature and high speed, and the base oil with high viscosity is suitable for high Installation And Use temperature and high load. The water resistance of thickener determines the water resistance of grease.
In principle, greases of different brands cannot be mixed, and even Installation And Use greases with the same thickener will have bad effects on each other due to different additives.
4、 Addition of grease
When lubricating SKF bearings, the more grease the better, which is a common misconception. Excessive grease in SKF Bearing and SKF Bearing Chamber will cause excessive mixing of grease, resulting in extremely high temperature. The amount of lubricant filled in SKF Bearing should be 1 / 2 ~ 1 / 3 of the internal space of SKF Bearing, and should be reduced to 1 / 3 at high speed.
5、 Installation and disassembly of SKF Bearing
During installation, do not directly hammer the SKF Bearing end face and non stressed surface. Use pressure block, sleeve or other Installation And Use installation tools to make the SKF Bearing bear uniform stress. Do not drive the installation through the rolling element. If the mounting surface is coated with lubricating oil, the installation will be smoother.
If the fit interference is large, SKF Bearing shall be put into mineral oil and heated to 80 ~ 90 ℃ for Installation And Use installation as soon as possible. The oil temperature shall be strictly controlled not to exceed 100 ℃ to prevent tempering effect, hardness reduction and size recovery.
In case of difficulty in disassembly, it is recommended that you carefully pour hot oil on the inner ring while Installation And Use pulling outward with the disassembly tool. The heat will expand the inner ring of SKF Bearing, making it easier to fall off.
6、 Selection of radial clearance of SKF Bearing
Not all SKF bearings require small working clearance. You must select the appropriate clearance according to the conditions. In national standard Installation And Use 4604-93, the radial clearance of rolling SKF Bearing is divided into five groups – group 2, group 0, group 3, group 4 and group 5.
The clearance value increases from small to large, of which group 0 is the standard clearance. The basic radial clearance group is suitable for general operating conditions, conventional temperature and common interference fit;
Large radial clearance should be selected for SKF Bearing working under special conditions such as high temperature, high speed, low noise and low friction; Small radial clearance should be selected for precision spindle and SKF Bearing for machine tool spindle; For roller SKF bearings, a small amount of working clearance can be maintained. In addition, there is no clearance for separate SKF bearings;
After installation, the working clearance of SKF imported bearings after installation is smaller than the original clearance before installation, because SKF bearings have to bear certain load rotation, as well as the elastic deformation caused by SKF Bearing matching and load.