Looks like they do make some rotary screw compressors that don't have oil,
they use water to cool them instead. Not too common but they are available.
Looks like the rotary scroll stuff may be the more "cost effective" oilless
high output units for you home shop:-) about 8k vs. 18k for the oilless
=======================Well they both work.... no problem there... and for ocassional use
either will do just fine...
I have owned both types... and absolutely hated the Noise the oil less
compressor put out... just drove me bonkers... This is not to say the
oil tyes are quiet...not by a long shot... er... just much
I now have a 8 Hp 80 Gallon upright compressor and to be honest if I
have to drive a few brads I will fill a small portable tank with air
and just hook up the nailer to it... I need the large compressor
because I restore cars ( another hobby) and need it.
I'll chime in here and say if you plan on keeping your compressor for
a while and plan to use it for a lot of other things get an oil
lubricated compressor. It'll last longer and if you sell it it'll have
a higher resale value. Lubricated compressors run quieter too.
You can always rebuild oilless compressors but sometimes the cost or
time involved outweighs the effort put in and/or the value of the
compressor. Personally I would never buy a used oilless compressor.
However, if you plan to use your compressor on uneven surfaces, like a
rooftop go with oilless. Or, you can use a lubricated compressor on
the ground and use a longer hose.
Hope this helps,
On Wed, 13 Apr 2005 21:45:38 -0400, Dean Hummel
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