Installation and removal of SKF bearings
Do not directly hammer the end face and non-stressed surface of SKF bearing during installation. Press blocks, sleeves or other installation tools should be used to make SKF bearings evenly stressed. Do not install through the transmission force of rolling elements. If the installation surface is coated with lubricating oil, the installation will be smoother.
If the matching interference is large, the SKF bearing should be installed as soon as possible after being heated to 80~90℃ in mineral oil. The oil temperature should be strictly controlled not to exceed 100℃ to prevent the tempering effect from reducing the hardness and affecting the size recovery. When the disassembly is difficult, it is recommended that you use the disassembly tool to pull outwards and carefully pour hot oil on the inner ring. The heat will expand the inner ring of the SKF bearing and make it easier to fall off.
Selection of SKF bearing radial clearance
Not all SKF bearings require the smallest working clearance, you must select the appropriate clearance according to the conditions. In the national standard 4604-93, the radial clearance of rolling SKF bearings is divided into five groups-2 groups, 0 groups, 3 groups, 4 groups, and 5 groups. The clearance values are in order from small to large, and the 0 group is the standard clearance. The basic radial clearance group is suitable for general operating conditions, conventional temperatures and commonly used interference fits; SKF bearings that work under special conditions such as high temperature, high speed, low noise, and low friction should use large radial clearances; For precision spindles and machine tool spindles, SKF bearings should use smaller radial clearance; for roller SKF bearings, a small amount of working clearance can be maintained.
In addition, there is no such thing as clearance for separate SKF bearings; finally, the working clearance of SKF imported bearings after installation is smaller than the original clearance before installation, because SKF bearings have to withstand a certain load rotation, and SKF bearings are matched And the amount of elastic deformation caused by the load.