The ball joint provides the mobile connection between the suspension lever and the spindle, and the ball joint must adjust the rotational movement and absorb the entry and exit movement of the suspension lever. A rubber cover protects the ball joint from dirt and moisture and also retains the grease that lubricates it. The grease in the ball joint is essential for long-lasting operation without excessive wear, the grease forms a film between the ball and the bowl and thus prevents metal-to-metal contact. Metal-to-metal contact will damage the ball and bowl, resulting in excessive wear.
Note : If several qualities are available, the difference is in the service life. If no quality indication is given or the part is characterised by the term A-quality, then these ball joints are equal to the original. With the indication B-quality you can assume that the life span will be remarkably shorter. On the other hand, the fit of both qualities is identical.
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