Originally Posted by Mike B
I have a twin cylinder single stage Quincy on a 60 gallon tank and it handles my sandblasting cabinet just fine. The compressor has a pressurized oiling system and unloaders that don't allow the compressor to start making air until it has oil pressure. It's been my work horse for over 25 years...
Mike B smile
I also have a Quincy I really like, picked it up on ebay for real cheap. It's single stage on a 125 gallon tank, two identical compressors and 2 motors. I swapped one motor out for a 7.5Hp and used larger pulley, (checked the manual, it's OK) the other is a 2 Hp. It's set so the 2HP motor starts first on falling pressure and if it can't keep up the big one kicks in, both cut out at same pressure.

When looking for a Quincy compressor be aware that they now also have some cheaper ones without pressure lubrication or unloaders.

Here's a picture of mine.
http://rides.webshots.com/photo/2604060520080251109graBTh

The two unloader towers per unit indicates single stage. A two stage Qunincy 2 cyl compressor will have only one unloader tower.

Single stage is best used for about 100 PSI max, any more than that and two stage is preferred.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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