The degree of the actual interference fit(s) determines the axial load carrying capacity of a stepped sleeve. When stepped sleeves are made to the recommended dimensions listed in table 1
and table 2
, the surface pressure between a solid or thick walled hollow shaft and sleeve, and the axial retaining force per millimetre hub width can be estimated using the approximate values listed in table 3
. Stepped sleeves with a loose fit for the smaller diameter, exert only half of the axial retaining force of stepped sleeves with an interference fit for both diameters.
When designing stepped sleeves, axial shock forces on the sleeve must also be taken into consideration. If necessary, a threaded nut which is lightly tightened and which can also serve as a mounting aid can be used to secure the sleeve.