X8126万能工具铣床上加工的零件表面粗糙度高。1982年我们在大修时对垂直主轴的结构作了改进。其加工零件的表面粗糙度有所下降,且较为稳定。 X8126铣床垂直主轴结构如图1所示。主轴3的径向刚度是由滑动轴承1和向心球轴承7承担;轴向刚度由止推轴承5和向心球轴承7共同保证。主轴向上的轴向力由轴承5承担;向下的轴向力由 X8126 universal tool milling machine parts machined surface roughness. In 1982 we overhauled the vertical spindle structure has been improved. The surface roughness of the machined parts has declined, and more stable. X8126 milling machine vertical spindle structure shown in Figure 1. The radial rigidity of the main shaft 3 is borne by the sliding bearing 1 and the radial ball bearing 7; the axial rigidity is jointly guaranteed by the thrust bearing 5 and the radial ball bearing 7. The axial force of the main shaft is borne by the bearing 5;