通過縱向擠(ji)壓鋼球進入套(tao)筒(tong),使套(tao)筒(tong)產生徑向膨脹,套(tao)筒(tong)外圍(wei)環(huan)形槽尖齒壓入相對低(di)硬度工藝孔材質(zhi)中(zhong)或套(tao)筒(tong)本身被擠(ji)入相對高硬度工藝孔粗(cu)糙表(biao)面的間隙(xi)中(zhong),達到與(yu)工件的咬合密封。可廣泛(fan)適用(yong)于低(di)硬度和高硬度材質(zhi)的工件。