Curt Raymond wrote:

> Anyway I can't afford more than about $250. I'd like to run an impact
> wrench, maybe a spot blaster and a couple other fairly low air tools.

Are you in a hurry?
15 years ago I bought a low hour (looked like new) 2hp Sanborn from
an ad in the local paper for $175. Took me 2-3 months to find it.
Fortunately, it was the only one I spent time looking at. Only time
I want more is when I'm using a die grinder. Duty cycle on that grinder
is like 20-30% on my little compressor. 

A friend bought a Campbell Hausfeld 2hp airless. Very noisy, but that
might be because the one of the 'connecting rods' broke. It was
 a twin cylinder opposed unit, the pistons and connecting rods were
cast in one piece from aluminum or pot metal. The drive was very crude.
I don't remember the specifics, but I think there was an offset peg
on the motor shaft that rode in a slot in the center of the piston
assembly to kick the pistons back and forth. If that's any indication
of oilless compressor construction, stay far away. 

Generally, the bigger a compressor is, the slower and quieter it seems
to be. (not to mention more expensive)

A friend of mine owns a monument company, they carve the lettering in
the marble with a sandblaster. When he needed a new compressor, he bought
a truck mounted rotary screw compressor from a electric company auction,
and then sold the truck for close to what he paid for it after he took
the compressor off it. Output to noise ratio is quite good on that 
compressor, but I doubt you need 50+ CFM for anything you do.

Mitch.

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