一些大、中型普通车床,普遍存在着尾座移动笨重的缺点。使用一段时间后,尾座与床身导轨间因相互摩擦而产生严重磨损,使尾座轴心降低(尾座下沉)。我厂在大、中修车床时发现,使用过三、五年的车床,尾座下沉量有的竟达0.2～0.6毫米。很显然,这将会给修理工作带来很大的麻烦。在这 Some large and medium-sized general lathes, the widespread existence of the tailstock bulky shortcomings. After using for a period of time, the tailstock and the bed rail are severely worn due to mutual friction, so that the tailstock axis is lowered (tailstock sinking). I plant in large and medium repair the lathe found that the use of three or five years of lathe, tailstock down some as much as 0.2 to 0.6 mm. Obviously, this will bring a lot of trouble to the repair work. At this