Cage for radial roller bearing

A radial roller bearing cage comprising a first and second metallic cage elements each having a pair of arc-shaped rim portions that are disposed so as to be spaced apart from each other in an axial direction and a plurality of pillar portions that are disposed at constant intervals in a circumferential direction so as to connect the pair of rim portions in the axial direction,

• the first and second cage elements being assembled together to be formed into a cylindrical shape as a whole, the pillar portions that lie adjacent to one another in the circumferential direction and the pairs of rim portions defining a plurality of pockets in which rollers are held so as to roll freely, wherein:
• circumferential end faces of the first and second cage elements each have at least one end side projecting portion that is provided so as to project towards one circumferential end side;
• the other circumferential end faces of the first and second cage elements each have at least one other end side recess portion that is provided so as to be recessed towards the one circumferential end side;
• the one end side projecting portion of the first cage element fits in the other end side recess portion of the second cage element;
• and
• the one end side projecting portion of the second cage element fits in the other end side recess portion of the first cage element, whereby the first cage element and the second cage element are restrained from being displaced relatively in the axial direction.