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我厂生产的MM52125A型龙门导轨磨床,有二只磨头。其中万能磨头主轴采用如图1所示的滚动轴承支承。径向载荷由D3182115型圆锥孔双列向心短圆柱滚子轴承2、6承受。轴向载荷由C268915型双列向心推力球轴承4承受,主轴转速为1200～2400转/分。这种布局形式对主轴回转精度和刚度是良好的。但这些滚动轴承的轴向定位,如用一般的螺纹紧固方式,则因紧固后很难保证轴承端面对主轴轴心线的垂直,从而影响了轴承的回转精度
I plant production MM52125A gantry rail grinder, there are two grinding head. One universal grinding spindle as shown in Figure 1 shows the rolling bearing support. Radial load by the D3182115-type tapered bore double row to the heart short cylindrical roller bearings 2,6 withstand. Axial load C268915 double row to the heart thrust ball bearings 4 to withstand the spindle speed of 1200 ~ 2400 rev / min. This layout is good for spindle slewing accuracy and rigidity. However, the axial positioning of these rolling bearings, such as the use of general thread fastening, it is difficult to ensure the fastening of the bearing end face of the vertical axis of the spindle, thus affecting the bearing slewing accuracy