Date: 2013-08-20

Bearings used in conjunction with the technical requirements

The correct choice complexes, must know the actual load conditions of the bearing, the working temperature and other requirements, and in fact it is very difficult. Therefore, in most cases is selected according to use lapping mating.
Between the ferrule and the shaft or housing over win amount depends on the size of the load, a heavier load is large over WIN, the lighter the load using the smaller the amount of over-WIN.
1, the speed and the temperature rise:
With the development of science and technology, increasingly high spindle speed, variable speed range is growing, more and more high, bearing high-speed operation stability requirements. Machine tool spindle bearing temperature is an important factor to limit the speed of the bearing. Typically, the correct choice of the type of non-standard bearings, the high-speed performance of the rolling bearing tolerance class configuration, the size of the clearance (preload), lubricants and lubrication methods can be improved to some extent.
2, the life and carrying capacity:
General machine tools, the life of the spindle assembly to maintain the accuracy of the spindle period of use, therefore, requires the precision of the bearing to maintain the performance to meet the requirements of the spindle component life. Heavy machine tools or power cutting machine, you should first consider the carrying capacity of the non-standard bearings.
Rolling bearings of precision parts, and thus require cautious attitude, both to change the use of a high-performance bearings use, if used improperly, they can not achieve the expected performance results, so use bearings make should note the following:
Keep non-standard bearings and its surroundings clean. Even if the the invisible smile dust entering the bearing, and also increase the bearing wear, vibration and noise.
Using the installation to be careful, do not allow powerful punch, does not allow a direct hit with a hammer bearing, and not allowed to pass through the rolling pressure.
Use appropriate and accurate installation tools to make use of a special tool, and tried to avoid using something like cloth and short fiber.
To prevent corrosion of the bearings, bearing direct hand pick in hand, to fully wash away sweat and coated with a high-quality mineral oil
Inside diameter and outside diameter dimensions of rolling bearings are manufactured according to standard tolerances, with the tightness of the bearing inner ring and the shaft, the outer ring and housing bore can only be achieved by controlling the journal of tolerance and the tolerance of the housing bore. The inner ring of the non-standard bearings and shaft with hole basis, bearing outer ring and housing bore with the shaft system.

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