Deep-groove ball bearing

A deep groove ball bearing that comprises:

• an outer ring with an outer ring raceway groove on an inner diameter surface;
• an inner ring with an inner ring raceway groove on an outer diameter surface;
• a plurality of balls rollably arranged between the outer ring raceway groove and the inner ring raceway groove;
• and
• a seal member fixed to the outer ring and disposed in contact or non-contact with a seal groove formed in a shoulder portion of the inner ring to seal a space between the outer ring and the inner ring, wherein:
• an axial cross-sectional width of the deep groove ball bearing is smaller than a radial cross-sectional height of the deep groove ball bearing;
• a thickness of the inner ring is greater than a thickness of the outer ring;
• a pitch diameter of the ball is larger than a median diameter between an inner diameter of the inner ring and an outer diameter of the outer ring;
• and
• a radial dimension between an outer diameter of the shoulder portion of the inner ring and an inner diameter of the seal member is greater than the thickness of the outer ring.