介绍CNC30数控车床主轴组件的性能要求和组成，以及主轴轴承、主轴组件的刚度计算。
The performance requirement, composition of spindle unit and the rigidity calculation of spindle bearing and unit for CNC30 nc lathe are discussed in this paper.
为高速数控立、卧车床，高速立、卧加工中心等配套的高速、高精密主轴轴承，产品精度达到了P2级；
For high-speed nc made, WoChe bed, the high speed machining center, etc, down made of high speed and high precision supporting spindle bearing, the product precision P2 level;
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