Date: 2013-08-22

Study on bearing clearance

Bearing internal clearance before installation (the original gap) and installed when the operating temperature is reached after bearing internal clearance (gap), the former, different applications, and run the clearance requirements, imposed loads, this preload is to ensure that the bearing in the context used when the load to prevent slipping and causing damage.
Supporting parts of the machinery, in order to prevent the bearing outer ring inner ring and shaft, with the holes in the outer ring occurs when a machine running the relative sliding, required simple effective way. Especially for thin-walled ring for extra light, ultra light series bearings, using appropriate tight fit, allows the bearing in operation when the load average, to enable the bearings to move fully display their carrying capacity was more evenly. However, the selected bearing are not too tight, due to the contraction of the elastic expansion of the inner ring and outer ring bearing internal clearance is reduced, until it disappeared completely, thus affecting the normal operation of the bearing.
Primary role: the progressive stiffness of the bearing, noise reduction, compensation of wear increases to run gap, progressive axis guided precision, for this and extended bearing service life. Pressures are often the main targets (dynamic load rating Cr) coefficient, optimal preloading also need to be evaluated before pressure, tested constantly amended to determine the normal value, through the different regulation of the implementation.
Bearing and axle tie-base hole, bearing and housing combined with the use of standard shaft system. Bearing and shaft meet and tolerances for machines used in manufacturing combined with different rail system, bearing inside diameter tolerance for negative tolerance and, therefore, on the premise of using the same tie, inner diameter of the bearing and shaft of the tie tie in more closely than usual. Although the tolerance for the outside diameter of the bearing for tolerance, their tolerance values and system are not the same as the General tolerance of rail.

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