A flanged ball bearing with a 4mm inner diameter, commonly used in a timing belt idler assembly.
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Roller bearings use rolling elements, in this case balls, to reduce rotational friction and support rotational and axial loads. The load is transmitted through the balls from an outer to an inner race and due to the fact that the balls are rotating, there is a much lower coefficient of friction compared to two surfaces sliding over each other. In most cases one of the races is stationary, while the other is attached to a rotating assembly.
Both sides of this F624ZZ bearing are shielded, protecting against dirt and ensuring the lubrication well contained, which improves durability and lifetime of the bearing. A typical application of this bearing is to support and guide motion of timing belt systems, where the flanged lip keeps the belt contained. Normally two of these F624ZZ bearings are used face to face.
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