美国的北美洛克韦尔公司在1968年首次提出“柔性球轴承”的概念,随后MPB（微型精密轴承公司）和其它一些公司都在研究它的实用问题。 滚动轴承发生疲劳损坏的平均寿命与滚道接触区下面的交变剪应力成正比,而后者又与最大压应力成正比。因此在不考虑其他因素,而仅降低压应力,就会延长轴承的使用寿命。理论上,轴承寿命是与应力的九次幂成反比的。 所谓柔性球轴承,就是从上述理论出发,把“支承”钢球的刚性梁（内圈）改为弹性梁（内圈改进）（如图1所示）。具体作法是在内圈的内表面上沿内圈的整个圆周 The North American Rockwell company in the United States first proposed the concept of “flexible ball bearings” in 1968, and MPB (Micro Precision Bearings) and others were studying practical problems. The average fatigue life of a rolling bearing is proportional to the alternating shear stress below the raceway contact area, which in turn is proportional to the maximum compressive stress. Therefore, without considering other factors, but only reduce the compressive stress, it will extend the bearing life. In theory, bearing life is inversely proportional to the ninth power of stress. The so-called flexible ball bearings, is based on the above theory, the “support” steel ball rigid beam (inner ring) to elastic beam (inner ring improvement) (Figure 1). This is done along the entire circumference of the inner race on the inner surface of the inner race