First, some device in using TIMKEN bearing of when on its itself of tour gap problem requirements of special strictly, if tour gap had large, even slightly a points large words, on will easy makes device of parts wear, then had to through reduces tour gap to solution this problem, but with of of another problem also appears has, that is tour gap too small words, thermal of problem, thermal if improper, on will is easy led to internal temperature rise eventually resulted TIMKEN bearing overheating and burn!
1) original clearance
Refers to original clearance bearings TIMKEN bearings after complete installation in front of the machine, the clearance in a free State. Original clearance is measured is actually difficult to know. Therefore inspection clearance original clearance is often used instead.
Testing clearance is under examination, under the measuring load imposed conditions, equipment testing and clearance data, bearing the original clearance and strictly speaking is not the same as, but in General both in reading on little difference between, which can be replaced without much error.
2) effective clearance
Effective clearance or the operational clearance is that bearings installed on the host, under certain loads, up to a certain temperature under steady-state operation condition, actual clearance in the TIMKEN bearings. It is clear that the effective clearance clearance smaller than work.
3 effect of bearing clearances and requirements
Clearance in the bearing is designed to ensure that the bearings are to operate flexibly without blocking, but also requires that can guarantee the stable operation of bearings, TIMKEN bearing axis of no significant settlement, as well as bear the load as much as possible the number of rolling elements.
May be too much load (preload is too large). Excessive speed. Clearance is too small. Water or other foreign bodies penetrated. If the above two conditions are not so is the poor accuracy of axle and bearing boxes, large deflections of the shafts. See here, I think we all want to know the way of solving the problem, first of all, to research on lubricant and lubrication method, selected the TIMKEN bearing lubricant, and its consumption, but also to rectify the bearing choice. Research in line with, bearing clearance and preload, and improved sealing device. Check the accuracy of the shaft and housing.


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