最初的森吉米尔20辊冷轧机和美国安装的第一台20辊冷轧机,采用由特殊的球面滚柱轴承组成的支承辊(图1)。每一个轴承相当于单支承辊,并通过自身支承的坚实的外圈承受部分轧制力。由于外圈是转动的部分,所以润滑油孔分布在内圈。轴承外圈的宽度比内圈的稍窄一些,这样,几个轴承可以并列在一起。其轴承的尺寸精度,与当时 The first Sendzimir 20-roll cold mill and the first 20-roll cold mill in the United States use a backup roll consisting of a special spherical roller bearing (Figure 1). Each bearing is equivalent to a single backup roller and is subject to a partial rolling force through its own solid outer ring. Because the outer ring is the rotating part, so the lubricating oil hole is distributed in the inner ring. The width of the bearing outer ring is slightly narrower than the inner ring, so that several bearings can be juxtaposed together. The bearing’s dimensional accuracy, at the time