The comprising of needle roller bearing

The comprising of needle roller bearing
A needle roller bearing comprised with a cage having a plurality of elongated window-shaped pockets at predetermined circumferential intervals, annular portions on axially opposite sides of the pockets, and pillar portions on circumferentially opposite sides of the pockets, wherein an axially middle portion of each of the pillar portions is dented so as to be smaller in diameter than axially opposite portions thereof, the axially middle portion and the axially opposite portions being continuous to each other through inclined portions, the axially opposite portions being formed with pocket wall surfaces on the side of the pocket’s plurality of needle rollers bearing received in the pockets of the cage, each of the needle rollers being prevented from radically outwardly slipping off from the pocket by the pocket wall surfaces,