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Dana,
Since many folks have broached the subject of air tools during this active
compressor discussion, I thought I would amplify one point that was brought
up long ago during a similar thread. As you know, most air tools typically
require some kind of lubricant to keep them running smoothly. Given the
type of work that we're doing and the susceptibility of our materials to be
fouled by oils, it is far better to purchase cheap air tools and run them
dry, then throw them away when they're consumed. Harbor freight has die
grinders for as little as $11.99 (rear exhaust $13.99), and during times of
special sales I've seen them marked down to $8... at those prices you can
afford to pick up half a dozen, keep different cutting and sanding tools in
each one and rotate their use depending on the job at hand. Even run dry
these things will continue to operate for tens if not hundreds of hours and
it's very reassuring knowing that you're not spraying an invisible (or
maybe not so invisible) mist of oil all over composite parts that you're
going to glue together and paint. If the engineer in you won't let you
mistreat a tool this way, regardless of how inexpensive it might be, and
you feel that you must provide a little lubricant (a drop a week... sounds
pretty ok to me, but still oil) then be sure that you purchase tools only
with rear exhausts and keep a shop rag tied around their outlets to keep
the oil off of your working parts. I've personally used both straight and
90 degree cutters from HF without lube and they've never missed a
beat. Just remember to do whatever you can from spraying oil on your
project and you'll sleep better at night.
<Marv>
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