| 摘要 |
In a cylindrical roller bearing 20 for continuously variable belt and pulley transmissions which is used at rotational support portions of a continuously variable belt and pulley transmission and in which a plurality of cylindrical rollers 23 are rollably provided in a circumferential direction between an outer ring 21 and an inner ring 22 , a raceway surface 23 a of the cylindrical roller 23 is made to take the shape of a full crowning, and a radius curvature R of the full crowning is made to satisfy a relationship of 0.01<=L<SUP>2</SUP>/(DaxR)<=0.03 relative to a diameter Da and a roller length L of the cylindrical roller 23.
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