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Shaft requirements

To achieve reliable sealing performance and maximum service life, the counterface for a radial shaft seal should meet the requirements outlined below. The seal counterface must be able to accommodate all permissible deviations and movements – surface SL and an additional surface SL’ – which may be required in the case of repairs or inspection (fig 1).
In cases where a shaft cannot be machined to meet the requirements, SKF recommends the use of SKF SPEEDI-SLEEVE or a wear sleeve for heavy industrial applications (LDSLV). For detailed information about sleeves, refer to the section Wear sleeves.
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