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Extending Bearing Life With Non-Contact Bearing Isolators

01 February 2004

Garlock has introduced a non-contact bearing isolator, which reduces the
ingress of water and particles in oil - a major cause of premature
bearing failure. Dubbed 'Klozure Guardian', this bearing isolator range
can be installed onsite by hand; no special tools are required, thanks to
a novel cam lock system. The unit is supplied fully assembled and
comprises two bronze bodies separated by a PTFE locking ring. The latter
ensures that there is no contact between metallic parts, as well as
reducing energy losses by minimising friction. There are no internal
O-rings, and the operating temperature range and maximum surface speed
are -34 to +204°C and 61m/s respectively.

The Guardian bearing isolator is a cost-effective alternative to 'torque
generating' lip seals in heavy-duty applications, from severe-duty motor
installations in the processing industries to paper roll end bearing
seals and pump bearing frames. In addition to its timesaving cam lock
locating system, which avoids the need for an arbor press, Guardian also
tolerates a high degree of misalignment. Indeed, the shaft-to-bore
misalignment of +/-0.51mm and axial motion of +/-0.64mm makes it a
suitable replacement for seals on older, worn equipment. Further details
about this new product and a motor conversion table are available from
Garlock's web site, a link to which is provided from the DPA site.

* Garlock has also announced that it is to make its advanced research
facilities at Pierrelatte in France available to design engineers
seeking particular solutions to sealing problems. Garlock's laboratory
is jointly operated with the French Atomic Energy Commission (CEA), and
over the years its scope has extended to support the special
requirements of aerospace, semiconductor and other high technology
sectors. The Pierrelatte facility is capable of creating computer
simulations extending from individual material performance to multiple
material seal simulations. This enables development times to be
significantly reduced prior to sample testing. The laboratory has
equipment capable of producing ultra-high vacuum and temperatures
ranging from -270 to +800°C. Extended life simulation services also
offer the capability of monitoring gasket thickness against
temperature, pressure and ageing.

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