Double-row self-aligning roller bearing

A double-row self-aligning roller bearing comprising:

• an inner ring;
• an outer ring having a spherical raceway surface;
• and
• a plurality of rollers arranged in two rows in a bearing width direction and interposed between the inner ring and the outer ring, each of the rollers in the two rows having an outer peripheral surface having a cross-sectional shape matching the raceway surface of the outer ring,
• wherein
• a ratio of a contact angle θ1 of the rollers in one of the rows to a contact angle θ2 of the rollers in the other of the rows falls within a range of 0.25≤θ1/θ2≤0.5, and
• a ratio of a distance B1 in the bearing width direction from an end face of the bearing on a side of the one of the rows to an intersection of two lines of action defining the contact angles of the two rows, relative to a distance B2 in the bearing width direction from an end face of the bearing on a side of the other of the rows to the intersection falls within a range of 0.5≤B1/B2≤0.6.