关于磨机的一句描述求翻译

Heavy-duty self-aligning spherical roller screen bearings with inner races fitted to the shaft and outer races mounted in the cast ductile iron bearing housing.
重型自对中球形滚动筛轴承，带内轴套固定在旋转轴上，其外轴套安装在塑性铸铁轴座上。