| 摘要 |
An automobile engine accessory pulley bearing comprises an outer ring (3), an inner ring (5), a plurality of rows of balls (7, 8), cages (9, 10), and seals (11, 12) disposed at the back of, and spaced from, the cages (9, 10) and defining a grease storage space. The automobile engine accessory pulley bearing has a bearing outside dimension of not more than 65 mm in diameter, and a bearing width dimension of not more than 45% of the inner diameter dimension, the diameter of the balls (7, 8) being not more than 4 mm, the distance (L) between the back (19) of the cages (9, 10) and the inner surface (20) of the seals (11, 12) being not less than 13% of the ball diameter (Da).
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