用於隔開並保持軸承、滾子(經修改)的滾動元件的框架或外殼。
machined retainer fabrication method, 3.0010 inches minimum and 3.0030 inches maximum bore diameter, 3.2010 inches minimum and 3.2030 inches maximum outside diameter, 1.6900 inches nominal overall width, steel comp 304 overall material