"brianlanning" wrote in message
ups.com...
I read somewhere that they are aluminum (for improved cooling they say)
but cast iron cylinder sleeves. I'm ok with that. Also, the manual
for the c7550 says this:

Cast iron is much better. Worth looking for.


This air compressor pump is capable
of running continuously. However, to
prolong the life of your air
compressor, it is recommended that a
50%-75% average duty cycle be
maintained; that is, the air compressor
pump should not run more than 30-45
minutes in any given hour.

You may never exceed this duty cycle and you'd be ok, but if you think you
might ever, on any off chance, perhaps one day be running a compressor hard,
get a continuous duty cycle unit.


That's probably ok for me. I'd want continuous duty for spraying from
time to time, but would never do that every day. And I'm sure I would
empty the gun and need to refill before the 30 minutes is up. I can't
imagine standing in one spot with an air sander for more than 30
minutes also.

Spraying won't require continuous duty cycle, but if you ever run a DA (air
powered orbital sander) you sure will.


I'd probably rather have the IR also. But I'm trying to strike a
balance between cost and performance. This is probably already much
more compressor than I need. My main uses are going to be hvlp and
automotive work. I might get into metalwork and stone sculpting some
time in the future. I'm also trying to take advantage of the $150 off
sale at amazon.


IR is great stuff, but there is other stuff out there that is very good and
costs less. You're right that it's probably more than you need now, but you
will put it to more and more use once you have it. If you're going to do
automotive work then get the big tank and go for 100% duty cycle. 15-18
SCFM also.

--

-Mike-