Well, I received the write-up from US Tower regarding the use of
synthetic oils in their motorized winch gear boxes (thanks, Shana). It
is a specification sheet from Hub City, apparently the manufacture of
the gear box.
The sheet lists three recommended lubricants available from the
manufacturer. The first two are non-synthetics:
1. Ambient Temp: 15 to 60 deg F
2. Ambient Temp: 30 to 125 deg F
"...heavy duty industrial gear lubricants containing sulfur phosphorous
antiwear additives. [Substitutes] must be compatible with bronze gear
materials and nitrile rubber seals."
The third lubricant is an "all temperature" synthetic:
"...recommended [for] low start up temperature and/or high operating
temperatures. This lubricant can be operated at temperatures
considerably above 225 deg F." But no mention is made of a low temp
limit or range.
So here's my question. I love in a small town within driving distance
of a medium city. A typical cold winter morning here will drop to +10
deg F. Several years ago it dropped to 20 below, but zero is a more
normal lower limit.
Without special ordering something, what kind of oil should I look for?
A standard synthetic automobile motor oil? A non-automotive gear oil?
I don't want to make a winter project out of finding this stuff, but I
would like to find something suitable for this particular application.
Thanks to all you engineers out there. :)
Dick Flanagan W6OLD CFII Minden, Nevada DM09db (South of Reno)
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