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K94400 Emcor
Tester
The Emcor Grease Testing Machine evaluates the rust preventive properties
of greases on bearing components, measuring the ability of a grease
to protect a bearing against corrosion in the presence of water. As
bearings are normally used in environments exposed to humidity and temperature
variations, condensation may form on the bearing thus promoting the
onset of rust. Rust is detrimental to proper bearing operation and will
compromise the longevity of the bearing. A good quality grease should
be designed to protect the bearing from rust and corrosion under these
conditions.
The Emcor test is performed by mounting a double-row bearing per test
station for up to 8 separate test stations. The test bearings are specially-treated
1306K/236725 double row self-aligning ball bearings. The bearings are
washed carefully, filled with the appropriate quantity of test grease
and fitted on the shaft with the help of a nylon sleeve and nut. The
seals are fitted and the specified quantity of water is introduced into
the housings. The bearings are placed in the housings, and the housings
are closed and sealed. The test is conducted with the bearings partially
immersed in water and in a sequence of running and resting over a period
of one week. This also determines whether the thin oil film left in
the contact zone of rollers and raceways is able to protect the bearings
against corrosion while the bearings are standing. At the end of the
test, the raceways of the bearing outer rings are inspected for rust.
The Emcor system features test method versatility, since both greases
and oils can be tested as well as variations can be made with regard
to the test medium (e.g., brine instead of water). The costs for running
these tests are minimal. The two test bearings are the only machined
parts that have to be renewed for each test, and the polyamide material
for the housing is rigid and strong and rarely ever needs replacement.
Specifications
Conforms to the specifications of:
ASTM D6138; IP 220; ISO 11007; DIN 51802; NFT 60-135; SIS 155130
Electrical Requirements:
115V, 60 Hz, 1 phase
230V, 50 Hz, 1 phase
Dimensions lxwxh,
in.(cm)
48.5x15x11 (123x38x28)
Net Weight: 88 lbs. (40kg)
Shipping Information
Shipping Weight: 121 lbs (55 kg)
Dimensions: 8 Cu. Ft.
The results can be obtained by comparing the rust patterns in the bearing
with the provided chart: |
