Improper installation of rolling bearing, too tight or too loose fitting tolerance

Solution: the working performance of the rolling bearings not only depends on the manufacturing precision of the bearing itself, but also on the dimensional precision, shape and position tolerance and surface roughness of the shaft and hole fitted with it, as well as the selection and installation of the correct or not.

In general horizontal motors, well-assembled rolling bearings only bear radial stress. However, if the inner ring of the bearing is too tightly fitted with the shaft, or the outer ring of the bearing is too tightly fitted with the end cover, that is, when the balance is too large, the bearing clearance will become too small after assembly, sometimes even close to zero.So the rotation is not flexible, running will be hot.If the bearing inner ring is too loose in coordination with the shaft, or the bearing outer ring is too loose in coordination with the end cover, then the bearing inner ring and the shaft, or the bearing outer ring and the end cover will rotate relative to each other, resulting in friction and heat, resulting in overheating of the bearing.

In general, the standard moves the tolerance zone of bearing inner ring inner diameter as the reference part below the zero line, which fits the tolerance zone of the same shaft with the bearing inner ring much more closely than it does with the general reference hole.

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