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The smaller the radial clearance of the bearing, the better?

2016-10-13
Not all bearings require minimum clearance, and you must choose the proper clearance according to the conditions. GB 4604 - 93, rolling bearing radial clearance is divided into five groups: group 2, group 0, group 3, group 4, group 5, followed by clearance values from small to large, 0 of which were for the standard clearance.
The basic radial clearance group applies to all operating conditions, the conventional temperature and commonly used fit; bearing at high temperature, high speed, low noise, low friction and other special conditions are advised to choose a large radial clearance; the spindle bearings, precision machine tool spindle radial clearance should be selected to keep smaller; a small amount of clearance work can roller bearing.
In addition, the separation type bearings are no clearance; finally, the bearing installed clearance work, than the original pre installed clearance is small, because the bearings to withstand a certain load and rotation, and the load bearing with elastic deformation.