Fit and clearance of double row self-aligning ball bearings double row self-aligning ball bearing, both according to the high-precision bearing requirements, but also the requirements of high temperature bearings, so consider fit and clearance to take into account the following two points:
(A) raised from room temperature to the high temperature dimensional change and hardness change;
(2) high speed, the centrifugal force caused by the force system change and shape change.
In short, high-speed, high-temperature conditions, from the choice of co-ordination and clearance should strive to maintain the accuracy and performance of the double row self-aligning ball bearings, which are difficult.
In order to ensure that after the installation of the double row self-aligning ball bearing raceway deformation is small, can not get too much interference with the amount of interference, high speed centrifugal force and high temperature thermal expansion, or offset the mating surface normal pressure. Or with the relaxation, and therefore the amount of interference must be calculated carefully considered the above two factors, the normal speed at room temperature under an effective amount of interference may be invalid for double row self-aligning ball bearings.



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