Plastic ball bearings won the corrosion resistance battle
against metal bearings in a salt water test conducted at the igus test
laboratory. The winner, xiros by motion plastics specialist igus, competed
against metal ball bearings in one of the largest laboratories in the world for
testing plastics in moving applications, and was found to be up to 60% lighter
and 40% more cost-effective than the metallic version.
Available from Treotham, xiros flanged ball bearings are
made using lubrication-free and maintenance-free tribo-plastics.
The plastic and metal bearings were tested at the igus
laboratory where more than 12,000 tribological tests are conducted every year including
tests that investigate the use of a wide variety of materials in the most varied
To test xiros flanged ball bearings and metal bearings
in salt water, the engineers at the igus laboratory filled a container with
saltwater from the sea and heated it to +80 degrees Celsius. The two different bearings
were placed inside for 120 hours; these included a classic 2-hole flange
bearing made of metal and a xiros flange bearing made of xirodur B180, a
high-performance plastic that has been optimised by igus for years in terms of
wear and media resistance. Both bearings were not completely covered in the
test, but exposed to air to trigger the corrosion effect.
After just a few hours, the metal bearing began to
corrode with significant traces of rust visible on all bearing components at
the end of the test. The xiros flange ball bearing remained unchanged even
after 120 hours in the aggressive, high temperature salt water. There was no
colour change or any trace of rust.
The test proved that xiros plastic ball bearings
delivered a clear advantage, making them ideal for cleanroom as well as food
and medical technology applications, where rust can pose a hygiene risk.
Key features and benefits of xiros ball bearings include
four-component design consisting of the inner and outer rings as well as cages
made of plastic and balls made of stainless steel or glass; wear-resistant, maintenance-free
polymer bearings enabling a very smooth and hygienic dry operation without a
single drop of lubricating oil unlike metal bearings; long service life easily
calculated online; and non-magnetic, electrically insulating and
temperature-resistant from -40 to +80 degrees Celsius.
xiros ball bearings are suitable for absorbing medium
loads and are preferred by customers around the world for their reliability,
especially in applications involving conveyor belts, labelling, handling and
packaging machines as well as filling machines.
For more information, please visit the Treotham
Automation website www.treotham.com.au
or call 1300 65 75 64.