一種相對扁平的剛性部件,帶或不帶中心孔,用於將環形軸承或套筒軸承固定在合適的外殼中。必須附有用於安裝的鑽孔和/或螺紋孔。不含:端蓋、電動旋轉設備。
4 first bolt circle hole quantity, raised surface w/ aperture cross-sectional shape style, 4.750 inches nominal outside diameter, 3.875 inches nominal first bolt circle diameter, 2.515 inches minimum and 2.525 inches maximum aperture diameter