Patent ID: 7416346
Filing Date: 2008-08-26
Classification: F16C

Abstract:
1. A cylindrical roller bearing comprising: an inner ring having an inner ring raceway surface; an outer ring having an outer ring raceway surface; and pluralities of cylindrical rollers each disposed between the inner ring raceway surface and the outer ring raceway surface, wherein at least one of the inner ring and the outer ring has a flange portion provided with a roller guide-surface which contacts with and guides end faces of the cylindrical rollers, wherein the end face of the cylindrical roller contacts with the roller guide-surface of the flange portion between a first position and a second position, the first position corresponding to a position of the end face of the cylindrical roller away from a center axis of the cylindrical roller by a distance 0.40×Da where Da is a diameter of the cylindrical roller, and the second position corresponding to a position of the end face of the cylindrical roller away from the center axis of the cylindrical roller by a distance 0.35×Da wherein the end face of the cylindrical roller has a convex-shaped crowning portion formed by a continuous curve which passes the first position and the second position, and wherein an angle α formed between a straight line connecting the first position and the second position and a straight line perpendicular to the center axis of the cylindrical roller is set to be 0.5° or less.