Coreless seal and rolling bearing

A coreless seal arranged between a rotation shaft and a shell-type outer ring, the coreless seal having an inner diameter surface opposed to an outer diameter surface of said rotation shaft with a space for preventing leakage of fluid, wherein

• the shell-type outer ring has a flange bent inwardly, and further wherein an outer diameter and an inner diameter of said coreless seal are dimensions obtained by adding interference for an amount of shrinkage;
• and still further wherein
• the coreless seal has a lip part which projects inwardly and toward the flange of the shell-type outer ring;
• a surface of the outer diameter being flat when viewed in cross section;
• and
• an end surface of the coreless seal which is in contact with the flange of the shell-type outer ring in an axial direction is flat;
• wherein when it is assumed that said dimension obtained by adding interference for an amount of thermal shrinkage in a radial direction is A, and an outer diameter dimension of said coreless seal in a free state at room temperature is B, the following relation is satisfied,
• 0.005B≦A≦0.030B;
• and
• when it is assumed that an outer diameter dimension of said coreless seal in a free state at room temperature is B, and an inner diameter dimension of said outer ring is C, the following relation is satisfied,
• 0.950B≦C≦0.985B, and
• when it is assumed that said dimension obtained by adding interference for an amount of thermal shrinkage in a radial direction is A, an inner diameter dimension of said coreless seal in a free state at room temperature is D, and an outer diameter dimension of said rotation shaft is E, the following relation is satisfied,
• E<D<E+2A.