To prevent this permanent deformation and deterioration in motion accuracy, the basic static load rating (Co) is given as the allowable load for the linear system.
rolling bearings - Static load ratings; Amendment 1: Annex A (informative) - Discontinuities in the calculation of basic static load ratings
滚动轴承.额定静负载.修改件1:附录A(信息).基础额定静负载计算的不连续性
Basic Static Load Rating (Co)
基本额定静载荷 (Co)
The basic static load rating and allowable static moment define the maximum static load in each direction, however, these maximum static loads are not necessarily applicable depending on the operating conditions, the mounting accuracy, and the required motion accuracy.
This basic static load rating is defined as the static load that results in the maximum allowable stress at the center of the contact surface between the rolling elements and the race way. The sum of the permanent deformation of the rolling element and that of the race way is 0.0001 time the diameter of the rolling element.
There are two basic load ratings of a linear motion system: basic static load rating (C0), which sets the static load allowance limit, and basic dynamic load rating(C), which is using for calculating travel life.
Basic static load rating of the bearing is defined as the external load that causes a permanent deformation of 0.0001 of the diameter of the rolling body at the contact point of the most loaded rolling body.
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