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- Increase
load and run for an additional 30 minutes
- Continue the previous 2 steps until
failure. During this process when the load capacity of
the test apparatus was reached, the
velocity was increased to 200, 300 etc. ft/min in order
to increase the PV value
- At failure the test rig was allowed to
cool and disassembled
- The surface roughness of the contact
area was re-measured
- Take macrophotographs of the bearing and
shaft
Failure was determined by the bearing smoking and
increased friction
Test Procedure
Thrust Washer Wear Test.
The test procedure was as follows:
- Clean rotating sample in reagent grade
methanol and wipe excess fluid off the metalife
coated sample
- Weight samples on an analytical capable
of 4 decimal places in grams
- Measure surface roughness of the sample
in u" Ra on a Form Talysurf
- Assemble test samples in the LFW6 (Falex
#6) thrust washer test apparatus apply grease
where necessary
- Apply load and start test rig
- Allow test rig to run for 20 hours and
measure friction force and temperature
- At the end of 20 hours, store test
rig
- Reclean and reweigh samples
- Remeasure surface roughness
- Take macrophotographs of the test samples
Test Results
Table I & II show the results of this evaluation.
(view after conclusion page) |
