Hi group,
please could someone expplain the term preload used in relation to linear rails and bearings.
for example HiWin lists three classes of preload Z0, ZA, and ZB, which correspond to a force between 0 and 0.12C where C is the dynamic load rating.
but, the catalog does not go into details of why/when preload would be good/bad ?
(catalog is at http://www.hiwin.com/catalogs/linear_guideways.pdf)
If I buy a rail+bearings with preload, can I ever take them apart and reassemble them myself or does it have to be done at the factory ?