FAQ's
for SFR 2522 Multi - Purpose Extreme Pressure
Grease  click to go to product. |
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Question: |
When we looked at the
temperature range of the high EP 2522 grease, the temperature range
stated was 530 degrees F. Can I use this grease if the bearing is really
that hot? |
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Answer: |
That figure is the dropping
point, this is a lab bench test to determine when in a confined space
the first drop of oil runs out of a test container. This test is a good
indicator of the overall temperature ability of the grease, but only
goes so far. In field experience, over many years and numerous
applications, the real maximum temperature for most grease is about 100
degrees F or 40 degrees C less than the published figure. SFR 2522
grease is able to support excellent film strength and keep the
lubricating oil in the grease matrix at about 400 degrees F [260 C] this
does require an increase in rate of re-lubrication. All greases when
pushed to their maximum performance envelope require careful examination
of both the type of grease used and how often you can guarantee the
re-lubrication period. When you are in the process of changing over to
the SFR grease make sure that compatibility is checked with our Binary
Grease Chart and as always, when in doubt please contact our Technical
Staff. |
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Question: |
run a casting company and
we operate on a 24 hour a day schedule. The most troubling area with the
constant break-downs is in the shaker boxes. These units hold, pack and
fill with foundry sand, the forms that we pour the molten metal into.
These gear units are on an eccentric with bearing supports. The bearings
constantly fail, can you solve the problem? |
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Answer: |
SFR products are severe
service performers. The first concern is to make sure that the grease
has a large load carrying ability, the base oil viscosity of the grease
should be higher than 500 SUS at 104F (40C) and contain both Extreme
Pressure and solid film Anti-wear agents. This is very important because
this units bearings and other mechanical parts are constantly under
stress from the vibration and shock loading that is the standard
conditions you operate under. The SFR 2522 grease fits the bill
perfectly. This number two grade grease has a 900 SUS base oil viscosity
and contains both chemical EP agents and moly which protects under
conditions where the grease has been squeezed out of the bearing. The
best change out procedure is to pack any new bearings about two-thirds
full of the 2522 and of course use the SFR 100 as the construction aid.
If you are adding the SFR 2522 Grease on top of another, call us to
check on the compatibility between the two. Then open the drain plug and
purge through the old grease until the color is the same as ours. Also
for a short period of time, say two weeks, open the drain and flush some
more grease out of the bearing. After this period you should be able to
extend the re-lubrication interval as your experience with the grease
increases. |
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