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Axial movement

Axial movement of the shaft relative to the housing bore does not detract from the sealing ability of radial shaft seals (fig 1), provided that the total surface in contact with the lip has the same quality with respect to hardness and surface finish.
The amount of axial movement that can be accommodated by V-rings, axial clamp seals and HDDF seals is limited by the permissible displacement of the seal relative to its counterface.
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