91精彩视频_美女草逼视频_福利视频免费看_日韩色电影_99久久精品免费看国产交换_亚洲性一区_超大量吹潮系列合集_h小视频在线观看_日本男人天堂网_国产精品6699

????It is necessary to distinguish between the internal clearance of a bearing before it is mounted and the internal clearance  of  a  mounted  bearing  in  operation(working  clearance).  Because  the  rings  are  mounted  with interference or transition fit, the rings will expand or compress, the bearing’s initial clearance is always larger than the working clearance.

????If the bearing is mounted with recommended fit and runs under the normal condition, the normal group of initial  internal  clearance is appropriate to the bearing’s working clearance .  If  the inner and outer rings are mounted with interference fit  or the working temperature is higher or lower,  we can select  larger or smaller clearance value than the normal group.