Bearings are roller persistent unary

nbsp;Persistent bearings are capable to perceive big axial loadings, and some of them and small radial.
Persistent bearings are subdivided in a form of rollers into three look:! with cylindrical rollers: with one short or several rollers of different length in each nest of a separator;! with conic rollers, tops of cones of rollers are crossed usually in one point on a bearing axis, these bearings can have both rings with boards or one ring with a board, other flat;! with barrel-shaped rollers, capable to perceive along with axial small radial loadings; for creation of a reliable oil film between a board and spherical end faces of rollers use liquid lubricant.
Separators of persistent roller bearings make of non-ferrous metals or staly.