年表作成・共有サービス - pastport

https://www.fv-bearing.com/self-aligning-ball-bearings/SelfAligning-Ball-Bearings.html
There are many precautions when installing rolling bearings. For example, do not directly hammer the bearing end face and non-stressed surface. Professional installation tools should be used to make the bearing evenly stressed. If the mounting surface is lubricated, the installation will be smoother. If the interference is large, the bearing should be heated to 90~100℃ in mineral oil and installed immediately. When the disassembly is difficult, you can use the disassembly tool to pull out while carefully pouring hot oil on the inner ring. The heat will expand the inner ring of the bearing, making it easier to fall off. These are common sense when installing rolling bearings. What we want to talk about today is to pay attention to the radial clearance of the bearing when installing the bearing. Have you paid attention to the bearing clearance during installation?

First, a question: Is the smaller the radial clearance of the bearing the better? the answer is negative.

Not all bearings require the minimum working clearance, and the appropriate clearance should be selected 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 from small to large, and group 0 is the standard clearance. The basic radial clearance group is suitable for general operating conditions, normal temperature and commonly used interference fit; bearings working under special conditions such as high temperature, high speed, low noise and low friction should choose a large radial clearance; Small radial clearance should be selected for precision spindles, machine tool spindle bearings, etc.; a small amount of working clearance can be maintained for roller bearings. In addition, there is no clearance for separate bearings; finally, the working clearance after the bearing is installed is smaller than the original clearance before installation, because the bearing has to bear a certain load to rotate, and the bearing fit and load are generated. amount of elastic deformation.

Therefore, the radial clearance of the bearing is not as small as possible. It should be selected according to the specific use situation. If you still can't choose, you can consult us. We are a professional rolling bearing manufacturer. We will provide you with Professional answer.