Full complement bearings
Full complement bearings capitalise
on the space normally occupied by the
ball retainer. This allows for more balls,
which in turn provides an increase in load
capacity, either predominantly radial, in
the case of filling notch designs, or axial
and in the case of angular contact designs.
The use of preloaded angular contact pairs
can also allow bi-directional axial loads to
be applied. Applications here range from
high temperature valves for aerospace
applications, to missile fin supports and
emergency touch down bearings.
Sub-micron coatings
and tribological characteristics of bearing
surfaces. The success of such techniques
relies on the avoidance of distinct layers
by generating a graduated or diffused
interface between different materials.
Similarly, keying layers such as nickel or
copper are frequently used to improve the
adhesion of soft films to hard or passivated
substrates.
Sub-micron coatings can be applied to the
internal and external surfaces of bearing
rings and rolling elements if required. For
example, molybdenum disulphide (MOS2)
or tungsten disulphide (WS2) can be
sputter coated to the surface of bearing
components in order to make bearing
The role of surface engineering in rolling
behaviour more predictable in harsh
bearing technology is also becoming
environments.
increasingly important as bearings get
progressively smaller, but are still required
Special polymers
to run faster, at higher temperatures,
In some high speed applications, the
carry higher loads and operate reliably for
longer periods.
can be applied to bearings that combat
with oil to increase the life of the bearing.
friction, prevent corrosion and reduce
The special polymer material retains the
wear, even under the harshest operating
oil in a controlled manner when vacuum
conditions. The resulting benefits
impregnated. Application examples
are higher power density, improved
include bearings for high speed aircraft
performance, more predictable/consistent
gyros.
longer service intervals. Multi-layer submicron (sputtered) coatings, for example,
can be employed to enhance the physical
of manufacturing means that the
integration of bearing systems into mating
components is becoming more common.
The resulting assemblies are neater, more
compact, faster to put together and offer
the additional benefits of reducing space
and mass, whilst resolving the issues of
tolerance stack-up.
For more information, please contact the
Barden Marketing Department on
+44 (0)1752 725531, visit the website
at www.bardenbearings.co.uk or email:
[email protected]
in special polymer materials. These
components are vacuum-impregnated
environments), lower running costs and
Pressure to reduce costs in all areas
ball separators or cages can be supplied
Advanced coatings and surface treatments
bearing behaviour (particularly in harsh
Adding value through new design
features
Other special polymers can be provided
for high speed harsh environments where
the bearings require high resistance to
chemicals or thermal attack.
Special design features can be
incorporated into the bearing to
improve its performance. These
features include flanges, shafts and
housings, which make fitting easier,
faster and more accurate, which
in turn, reduce assembly time and
overall operating costs.