机床主轴的刚性和转速,对机床的加工能力有很大影响。薄壁滚动轴承的研制成功,可以提高机床主轴的刚性,因而切削能力也相应地增大了。例如,数控车床的切削能力增加50%以上;采用滚动轴承的砂轮轴在改进装配条件和润滑方式后,其转速范围提高40%。从切削时间来说,提高主轴刚性和转 Machine tool spindle rigidity and speed, the machining capacity of the machine has a great impact. The successful development of thin-walled rolling bearings, can increase the rigidity of the machine tool spindle, so the cutting capacity has also increased accordingly. For example, CNC lathes increase cutting capacity by more than 50%; grinding wheel bearings with rolling bearings improve their speed range by 40% with improved assembly conditions and lubrication. From the cutting time, improve spindle rigidity and turn