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The inside diameter of MVR seals is machined for a press fit on the shaft (fig 1 and fig 2). As with radial shaft seals, do not hit the metal case with a hammer.
The sealing lip face should be lightly greased prior to installation, but no grease should be applied between the lip and case. A shaft finish of Ra 4 µm (160 µin.) is sufficient.
A lead-in chamfer should be provided. No splines or keyways are allowed.
Counterface surfaces for MVR seals should be prepared the same way as for V-rings. Avoid aluminium or soft metals in applications where there will be abrasive contaminants. Sharp peaks on turned surfaces should be removed.
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