What is the basic static load rating?
Basic static load rating is a bearing term that describes the static load of constant direction and magnitude at which the sum of the permanent deformation of the rolling elements and the permanent deformation of the raceways at the contact points receiving the maximum stress is 0.0001 times the diameter of the rolling elements.
Similarly, the basic static load rating of a ball screw is the axial load at which the sum of the permanent deformation of the steel ball and the screw groove surface is 1/10,000 of the steel ball diameter.
In the case of Ball Screws, the basic static load rating is generally not an issue. When calculating the life of a ball screw, the basic dynamic load rating is used, but only when the rotation speed is low, 10 min-1 or less, it is necessary to use a ball screw with a basic static load rating of 1 to 3 times the maximum axial load.
The basic static load rating will be the same regardless of whether the nut type is a single nut, integral nut, or double nut, as long as the shaft diameter, lead, number of revolutions, and ball diameter are the same.
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