Hydrostatic bearings with recirculation channels

To reduce heat generation in hydrostatic spindle bearings, especially in precision machine tools, it is necessary to provide intensive cooling of the working fluid. There are several ways of reducing power losses to fluid friction, e.g., by increasing the depth of the load-carrying pockets. However, this adversely affects the dynamic loading characteristics of the bearings. The Mosstankin Institute has developed high-speed radial-thrust hydrostatic bearings with working fluid recirculation in the load-carrying pockets. They are designed for use in high-speed spindle units of precision NC lathes.