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Product data Design features Page ..............16Page ..............57 Maintenance-free, long-life slidingcontact surfaces All freedom, as also freedom from
maintenance, has a price. In this case
a one-off cost – the purchase price.
Once installed, maintenance-free
spherical
plain bearings manufacturer and
rod ends
require no or very little maintenance.
The initial higher price is largely com-
pensated by the cost of the mainten-
ance that is avoided. As to offer main-
tenance-free solutions in a largenum-
ber of applications SKF produces
spherical plain bearings and rod ends
with different sliding contact surface
combinations (partly size-dependent):• steel/sinter bronze composite,• steel/PTFE fabric and
• steel/PTFE composite.In the first two combinations, the steelis hard chromium plated.
The self-lubricating dry sliding ma-terials of the maintenance-free sliding
contacts are not as strong as steel
and consequently deform more under
load. This makes these bearings more
sensitive to alternating or “hammer-
ing” loads so that steel-on-steel bear-
ings should be used under such con-
ditions. Maintenance-free spherical
plain bearings and rod ends are de-
signed for types of duty where• loads areheavy and are of constantdirection, or• friction should be low and also con-stant, or• relubrication is impossible orundesirable.
Maintenance-free,long-life sliding
contact surfaces Sinter bronze compositePTFE fabricPTFE composite 1
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