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Bonjour ,en français ; les roulements pour le guidage en rotation . les avantages : évité le frottement et epporte les charges axiale et radial important selon le type
The type of bearing that is preloaded are normally tapered roller bearings. the bearings are preloaded by tightening the nut to set tourqe and then by losening to a set point IE. 1/8 flat or as perscribed by the manurfacter .
Yes alignment is a factor but Setting of the running clearance between the rollers and iner and outer races is a bigger factor for a cool running bearing.
Bearing Preload is a thrust load applied to a bearing that removes excess play to eliminate misalign
