Patent ID: 6379049
Filing Date: 2002-04-30
Classification: F16C

Abstract:
A roller bearing comprising:an inner ring having a raceway surface; an outer ring having a raceway surface; a plurality of rollers rotatably interposed between the raceway surfaces of said inner and outer rings; wherein at least one of said inner and outer rings has a flange portion at at least one of its both side portions between which said raceway surface is interposed in an axial direction of said roller bearing, and a grinding undercut is formed between said flange portion and said raceway surface, wherein a contact ellipse is defined by mutual contact between said flange portion and the end face of said roller, and wherein an undercut allowance ratio of said contact ellipse is set in the range of âˆ’0.6&lE;(hâˆ’bâˆ’c)/b&lE;2, where (hâˆ’bâˆ’c)/b expressing the undercut allowance ratio, c expressing a grinding undercut dimension on said flange portion side, h expressing a contact point height between said flange portion and the end face of said roller, and b expressing the minor radius of said contact ellipse.