RADIAL BEARING DEVICE WITH FLUID HOLDING GROOVE AND ITS MANUFACTURE

PURPOSE:To surely hold the lubricating liquid by providing a fluid holding groove at a suitable position on either one of a revolving peripheral surface of a shaft or the inner receiving surface of a bearing. CONSTITUTION:Plural rows of V-shaped grooves are provided at suitable positions on the revolving peripheral surface 2 of a shaft 1 in the circumferential direction by means of striking or pushing with pressure. When the shaft 1 rotates, the fluid holding grooves 5 make the lubricating fluid move toward the part that was bent into a V-shape. The lubricating fluid gathered together at this bent part overflows the grooves to run into a bearing 3. This fluid is moved again to the bent part, owing to the fluid holding grooves 5. By repeating this procedure, the lubricating fluid is circulated. As a result, the lubricating fluid can constantly be supplied to the space between the shaft 1 and the bearing 3.