住友金属工业和三菱重工业最近研制出水封式完全无键轴承,这种轴承由三菱重工业制造。目前,已成功的应用在金鹿岛制铁所的冷轧车间串列式轧机上。试用结果表明,轧板厚度尺寸精度可大幅度地提高。新开发的无键轴承,采用油压法将轧辊压入组合式轧辊轴套(轴承的内环)中,然后将油抽出,把蛆合式轧辊轴套附着在轧辊上,固定后,用水封组合式轧辊轴套。从前,轧机的支承辊和组合式轧辊轴套的固定是采用键(压铁)式固定法。但是,键式 Sumitomo Metal Industries and Mitsubishi Heavy Industries recently developed a completely water-sealed keyless bearing, which is manufactured by Mitsubishi Heavy Industries. At present, it has been successfully used in tandem mill of Gold Deer Island Cold Rolling Mill. The trial results show that the thickness of rolling plate dimensional accuracy can be greatly improved. The newly developed keyless bearings, the use of hydraulic method will roll into the combined roll sleeve (bearing the inner ring), and then the oil out of the maggots roll sleeve affixed to the roll, fixed, with water seal combination Roll bushing. In the past, the rolling mill support roller and the combination of the roll bushing is fixed using a key (press iron) type fixed method. However, the key type