Compressor oil will stop your vacuum pump wearing out, but it will
limit the ultimate vacuum achievable because it contains volatile
components which vacuum pump oil does not. It is probably worth buying
proper low vapour pressure vacuum pump oil as the price is not
exorbitant. Check out Duniway Stockroom for pump oil:
Incidentally, if you haven't yet bought a vacuum pump, look at belt
driven models. The belt driven Welch and Edwards pumps are very rugged
and a good buy second hand. I believe Duniway stock the Welch models.
Thanks. I already bought a used pump like this:
I hope that after I sell the rest of the stuff that comes with the
pump, the pump would be about free to me. These Sargent Welch pumps
are great, but I will see if I can "do" with a smaller model like that
1/2 HP pump mentioned in that link.
I will pick this pump up this week.
Depending on local stores for you, you might expect to find vacuum pump
oil at farm supply (milk machine), HVAC (air conditioning) some auto
parts (also air conditioning), or an industrial supply. It can also be
I don't believe so. Vacuum pump oil needs to have very low
volatiles so it doesn't boil or otherwise outgas at the very low
pressures which the pump can achieve.
Proper vacuum pump oil is quite expensive, and you get it from
specialty houses like Cenco that sell to labs.
BTW A crimper which is right for your un-insulated terminals has
shown up on eBay. Check out auction number: 7586741978
22 hours to go.
Not as nice as the hydraulic crimper for the pre-insulated
terminals, but this one will handle sizes from #8 through 4/0,
all with what you see there. No need to get other dies, they
are all in the head, and selected by pulling a pin and rotating
And no -- I don't have one of these. I tend to prefer the
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