Join Date: Nov 1999
Location: Central California, USA
I don't think any 110v air compressor will do the job.
You should compare cfm at a certan pressure.
Here are some CFM numbers from a reference book:
The book says these cfm numbers are based on 90psi use and assume 25% use. Meaning they are being used only 25% of the time. If you are going to sand 15minutes without stopping, I'd multiply these figures by 4. Better yet if you can find the cfm from your manuals use that.
I ran a body grinder and sander and painted my race car with a 2 horse Sears type. It was the type sold about mid 80's.
I had to wait a lot and it got so hot the hoses heated up. The moisture would condense in my air tools! I had to install a toilet paper type filter and add hose to the system to try and cool the air down and make it drop moisture. It was probably a 10 or 15 gallon tank. I'd have liked twice as much power and air.
The 6.5/60 sounds good. It would help if you can put it in an area where it will recieve air blowing on it to cool it when it is working hard. Or position a fan that can blow on it even when it cycles off it so it will cool down more.
A bigger tank is nice and will cool the air some. I think when you are really working hard, meaning continuesly, the tank size is of less benefit. It depends on how you go at it. If you stop now and then the bigger tank will store more air. That's when a two stage pump will allow more pressure to be stored in the tank.
If you are using air closer to the capacity of the compressor, you might be better off with a single stage compressor as it should have a higher CFM rating.
On two stage systems, one piston pumps into the second piston to get enough pressure, up to 150-175 lbs.
On a single stage, they are usually 125psi max but pump more air cfm for the horsepower.
Single stage is better at pumping volume, two stage is better at pumping pressure.
My trusty little Craftsman was a single stage, two cylinder two horsepower. Since replaced by a 10hp three phase compressor.
My old air rachet really humps now, on 150psi! The DA sander, I have to turn down.
The older I get, the faster I was!