The good running characteristics of shaft guidance systems are dependent not only on the bearings. The geometrical and positional tolerances of the adjacent construction also play a significant role.

The higher the accuracy to which the adjacent construction is produced and assembled, the better the running characteristics.

Linear ball bearings KH and KH..-PP are pressed into the housing bore. This provides axial and radial location.
No additional means of location are required.

Linear ball bearings KN-B, KB, KS and plain bearings PAB must be axially located, for example by means of retaining rings or by the adjacent construction, Figure 1 to Figure 3.

Linear ball bearings KN-B can also be located by means of a screw, Figure 4.

Series KN-B and KS must not be located by means of shaft retaining rings. This could impair the function of the bearing.

Linear ball bearings KNO-B, KBO and plain bearings PABO must be axially and radially located.

These bearings are located by external means. A dog point screw should preferably be used for location, Figure 4.
Set screws are also suitable.

The locating screw must not be allowed to deform the bearing. The screw must be secured against loosening.

Linear ball bearing and housing units and linear plain bearing units are screw mounted into or through the fixing holes, Figure 5 and Figure 6.

Location of the units by means of dowels is only necessary in rare cases, but can be achieved easily by drilling out the centring holes.

Clean raceways are necessary in order to prevent premature failure of the shaft and bearing. The bearing position should therefore always be sealed.

The seals for the bearing series are shown in table.

Gap seals protect the bearings against coarse contaminants. Contact seals give protection against fine contaminants and also retain the grease in the bearing.

Linear ball bearings and linear plain bearings with contact seals have the suffix PP, example KH..-PP.

If the bearing and shaft are in a highly aggressive environment, it is recommended that the guidance system should be provided with additional protection by means of bellows or telescopic covers.