Cage for bearing

A bearing cage, comprising:

• a first circular ring;
• a second circular ring provided to be spaced apart from the first ring in a coaxial relationship with the first ring;
• a plurality of pillars provided in a circumferential direction of the first ring and the second ring, one end of the pillar being connected to the first ring and the other end of the pillar being connected to the second ring;
• a plurality of pockets provided in the circumferential direction and configured to provide a space in which a bearing roller is accommodated, the pocket being formed to be surrounded by the first ring, the pillars and the second ring;
• first reservoirs provided in the pillars and comprising a first storage space for storing lubricant;
• second reservoirs formed to extend in a radially inward direction from the pillars and having a second storage space formed to be opened in a radially outward direction to store the lubricant.