I need a compressor. I saw one today at Home Depot that was an upright on
wheels. A 5hp 115v. unit. It was Husky brand.
Anyone have any experience with Husky? I want the piston type, as the
others are just too loud.
I want to spend $4-$500.
I looked at IR, but they are expensive. Craftsman? Hausfeld Campbell? I
need something that will run air chisels, paint sprayer, etc, so it has to
be around a 2 hp. or more.
Suggestions and caveats, please.
I have a Craftsman 15 gallon 3.5 hp. It is big enough for me most of the
time. When I media blast/sand blast. I use a couple of old oxygen tanks for
I have a friend that bought a harbor freight vertical compressor and is
enamored with it. It fit right into the area of his garage and is 5 ph. His
wife spray paints frequently. Cost a lot less.
Look at the Max CFM that your air tools are going to use and buy a
compressor that meets or beats that number, horsepower is less important.
Choose the CFM you need and the compressor will come with enough hp to run
it. If you don't have enough CFM you will have to constantly stop and wait
for the air to catch up.
Almost, but not quite. You should also consider the duty cycles of the
tools and compressor.
For example an air sander may require 6cfm and you may expect to use it
at an 80% duty cycle. So, in a sample 100 minute period it will be run
for 80 minutes and consume 480cubic feet of air during this time.
Now if your compressor can produce 7cfm it will take about 68minutes to
generate this amount of air. This equates to a 68.6% duty cycle. If
your compressor is only rated at 50% you risk damaging it.
I would tend to derate the compressor cfm spec by its maximum duty
cycle before matching to your expected requirement
Good point, but be aware that allot of tool manufacturers already consider
average air consumption in tools specs! I have seen specs with average air
consumption, and air consumption at 100% duty cycle. Some of the averages
are so small that there is no way they are realistic.
Average CFM is 7.8, CFM is also stated at 24! So this tool consumes 24 CFM
while it is running 100%, 7.8 at apparently 33% duty cycle. I think the 7.8
figure is a bit conservative, so a 9-10 CFM @ 90 PSI compressor will
probably run it adequately, but at 100% you will need probably a real 10 HP
compressor to keep up!
If you buy a Coleman, get one rated at least 5 HP if you think you need
2HP. The ratings are exaggerated that much. (and Coleman admitted as
much in a class action lawsuit, although they didn't pay anything) I
bought a 6 HP Coleman a few years ago and it doesn't perform as well as
the ancient 2 HP Quincy compressor I had.
I don't remember who all else was a party to the lawsuit, but pretty
much all of the consumer air compressor manufacturers use such
exaggerated numbers the specs are all but worthless.
you can get a 60 gallon 5 hp campell housfeild oil bath piston
pump for about that or less if you look around. you really need at least
60 gallon tank to run air tools .80 is even better.
Ignore HP ratings! Your 5 HP Husky that runs on 115 volt is probably 1.5 HP.
Look at CFM @ 90 PSI, that will give you a good comparison.
As I said, the 5HP Husky is around 1.5 HP, the IR that you say is too
expensive is probably as they state HP wise. If you want to buy a compressor
once and never replace it, spend a $1000 or so on a IR and be done with it.
Semi-serious air tool usage will require a minimum of 10 CFM @ 90 PSI,
anything less and you will be wishing you had bought something larger.
I have a "7HP" Porter Cable 60 gallon air compressor that size wise serves
me well. Output is 9 CFM @ 90 PSI. I don't expect it to live for ever, but
then I don't work in the shop like I used to either. This 7 HP unit is
actually about 3 HP!
Motors will draw about 10-12 amps per HP at 115 volt, 1/2 of that at 240
Stay with oil lube. Better life, less noise. Most of the lower priced units
are all abut the same for quality and price.
When I decided I needed more compressor than my origional "5HP" Craftsman, I
was convinced by talking to "real" compressor shops to buy a used
"commercial" cast iron compressor. The 5HP 2 stage compressor I ended up
with delivers way more pressure and volume than the one it replaced, and the
sound is way more bearable. I was told it would last way longer than any of
the cheap compressors I could get at local "home inprovement" stores.
shipping, most states no Tax. I have an old 20 gal 3hp craftsman never had
any problems. But my experience with there newer stuff has been bad I think
there new add campaign is "If it's electric it will break if it's gas don't
worry it won't start"
In my opinion the air tank capacity is much more important than the pump HP.
unless all you want is something to pump up the kids bike tires once a
Get a unit with as large a tank as you can live with.
The pumps are usually matched fairly well to the tanks.
I'm a bit of a tinkerer. Seems like it oughta be possible to get an old 80
gal water heater. The propane comanies sometimes take out electric heaters,
and then sell the family propane for the rest of thier lives.
Then, with a day or two to come up to pressure, (fill the tank the first
time) just about any kind of compressor would do the job.
I've used a compressor off a refrigerator to compress air, in the past.
That was well before the 1993 freon regulations. In theory, an AC compressor
works nicely for an air compressor. But you have to change the lubricating
oil. Many HVAC guys can do that, but few will want to mess with a small job.
An AC compressor can be a lot quieter than the big compressor in the repair
Well, have fun and keep us posted.
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