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 bolt circle hole quantity, 5.000 inches nominal mounting bolt circle diameter, 2.156 inches minimum and 2.173 inches maximum aperture diameter, 5.750 inches nominal outside diameter