RADIAL BEARING UNIT AND MOTOR MOUNTED WITH THE SAME UNIT

摘要

PROBLEM TO BE SOLVED: To provide a radial bearing unit having much oil replenishing amount, making oil shortage on a radial sliding surface less prone to occur, having a long service life and capable of standing a long hour use. SOLUTION: In the radial bearing unit constituted of a shaft and a resin formed bearing having radial sliding surfaces formed on both end sides of a cavity part which does not slide on the shaft by increasing the diameter of an intermediate part of a bearing hole, a peripheral groove part is provided on a shaft outer peripheral surface facing to the cavity part and an oil reservoir is formed by the cavity part and the peripheral groove part.