To provide a retainer for a self-alignment roller bearing simplifying a manufacturing process and enabling stable rotation of spherical rollers.
The self-alignment roller bearing 11 is provided with an inner ring 12 having right and left double row inner ring raceway surfaces 12a, 12b on an outer diameter surface, an outer ring 13 having an spherical outer ring raceway surface 13a facing the right and left double row inner ring raceway surfaces 12a, 12b on an inner diameter surfaces, and a plurality of spherical rollers 14 having a curved rolling surface 14a meeting the inner ring raceway surfaces 12a, 12b and the outer ring raceway surface 13a. The right and left double row inner ring raceway surfaces 12a, 12b have surface roughness getting rougher toward an axially end part side form an axially center part side of the inner ring 12, respectively.
Morishita Hachiro
Hiroyuki Yoshida