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Matching precision of self aligning ball bearing
Clicks:2409 Date:11-11
Measure the size of the shaft and bearing seat hole to determine the matching accuracy of the bearing, and meet the requirements as follows:
The inner ring and shaft adopt interference fit, the amount of interference of 0 ~ +4 m (in light load and high precision is 0); combined with the outer ring and the bearing hole by clearance, clearance of 0 ~ +6 ~ m (but bearing on the free end of the use of angular contact ball bearings, can also increase the gap); shaft and hole surface roundness error below 2 m, the end bearing ring parallel degree below 2 m, in the face of foreign shoulder end beating below 2 m; the bearing hole of the shoulder axis beating below 4 m; the front end face of the cover the axis of the beating below 4 M.
When the bearing is pressed into the INA bearing, it should be flexible and no block. If the rotation is not flexible, it shows that the size of the shaft is too large and the tolerance should be lowered. If the import bearing is pressed into the shaft, there is obvious "rustle" feeling by hand rotation, it may be that the shaft tolerance is too large or the shaft roundness is not good. Therefore, in the control of shaft and bearing room tolerance, but also to control the roundness, at present, many domestic manufacturers only tolerance control, there is no control of roundness.
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