Garage Air Compressors

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You need capacity to run air equipment like ratchets and sanders. Alot of it. And then a pump big enough to replenish that massive capacity.
 
Originally Posted By: kaboom10
Sounds like what I could use. Air tools and painter runs the heck out of what I have now.


To many people under buy for HVLP and many other spray guns and sandblasting will run the death out of many units.
The key for painting is clean dry air and many small units will not produce leading do finish problems.
Buy one for life and buy big if you think you can use it NO one ever complains the have to much air just the opposite.
 
Originally Posted By: kaboom10
Originally Posted By: SIXSPEED
I got the IR Garage Mate today ... very nice compressor ... and very heavy too for a 20 gallon.


What is the CFM@90psi?

5.2 CFM @ 90 psi.
 
Originally Posted By: kaboom10
I have a 5.6CFM @90psi 28 gallon right now.


Not enough air to paint or do much of anything but fill a tire or run a air nailer. A nice unit for a homeowner but not going to get much real work out of it. I do not mean the comments to be harsh but the reality is it's not enough air for what sounds like you want to do.
 
Originally Posted By: kaboom10
Not harsh just reality. I have some tools that work and some that don't. My biggest disappointment is I couldn't paint.


The same problem most people run into when they want to paint or sandblast.
 
I was curious as to what my own, mid-eighties vintage, 220V. Craftsman roll-around garage unit puts out. 9.9 at 40 PSI, 7.3 at 90.

I sandblasted with it years ago and it was passable, although I seem to remember it having to replenish occasionally. I did non-HVLP painting with no replenishment waits.

Off-topic - I just discovered Bill's About Air Compressors website . He has a section on sizing.
 
Originally Posted By: dave123
Originally Posted By: kaboom10
I have a 5.6CFM @90psi 28 gallon right now.


Not enough air to paint or do much of anything but fill a tire or run a air nailer. A nice unit for a homeowner but not going to get much real work out of it. I do not mean the comments to be harsh but the reality is it's not enough air for what sounds like you want to do.

28 gallon is way overkill for an air nailer. I run 4 air spikers off a 5.5 hp Honda motor and a v-twin pump similar to the one pictured above.
Now this compressor runs 4 spikers and an air stapler all day long with no lack of air. When I hook up my 1/2 impact to bold ledger boards to houses for decks it depletes the tanks in about 15 seconds.
Impacts,air sanders,air ratchets etc consume enormous amounts of air. A tank such as what is pictured above would need a triple cylinder pump,or huge twin and 3 phase power to keep up with a media blaster.
The pump pictured above is more than adequate for home use,various tools can be run off of it but don't expect it to run body shop equipment efficiently. The tank is too big for the pump to maintain consistency and once the pressure falls below 70lbs you will have to wait at least 90 seconds for it to get back up to pressure.
What I have done to all my compressors is adjusted the valve that tells tge pump to turn on. it used to start at 80lbs in the tank,now it starts pumping once tank pressure is below 130lbs. That gives the pump a head start and keeps 120lbs at the regulator for my needs. I also had a tank welded with air nipples to increase capacity thereby keeping the guns shooting for longer.
 
More cfm is better with air compressors. Big tank low cfm equals long wait time. Most want an air compressor to make the job easier and save time not be frustrated waiting on air.
 
I have a 60 gallon Ingersoll rand 18.1cfm@ 90 psi.


I bought too small in the beginning and had to go get bigger. I use it for impacts, ratchets and die grinders.

when I need the air it never lets me down.

I was able to put mine in the basement. it was easier for the electric and I wanted to avoid cold starts, also my garage is small so space is better.

I have a Ingersoll rand filter,regulator and oiler.
I dislike this unit, it leaks and the filter doesn't do a great job, also the regulators suck I had one in my garage that failed.
 
Originally Posted By: dave123
Originally Posted By: kaboom10
Originally Posted By: Donald
Two stage, 5 HP, 60 gal tank from Northern.


CFM@90psi is?



True 5HP 60 gal tank 175psi max 230 volt compressor
16cfm @90psi would be a safe guess for most units some a tad more some a tad less.



Thats a bit low I think. I am thinking mine is about 14 CFM at 135 PSI. Two stage compressor.
 
I am going to remount mine on a pallet made of 2x4s & 2x6s. Its on the shipping pallet it came on 20 year ago and that is pretty beat up. I will also attach the 2 hose reels (clean and lubed air) to the pallet. Its very heavy and top heavy in addition. Moving it is a nightmare. If its on a pallet I think I can move it easier.
 
Originally Posted By: Donald
Originally Posted By: dave123
Originally Posted By: kaboom10
Originally Posted By: Donald
Two stage, 5 HP, 60 gal tank from Northern.


CFM@90psi is?



True 5HP 60 gal tank 175psi max 230 volt compressor
16cfm @90psi would be a safe guess for most units some a tad more some a tad less.
This comment is pretty much right on. Air compressors need big electric motors to turn them and flow a decent amount of air.
One of my v-twins cracked a head in the cold on Tuesday. So I went and bought a triple cylinder pump. My 5.5 hp Honda motor has no problem spinning it and the volume is substantially more.
These things usually go from 0-150 psi in about a minute. This new pump does it in 35 seconds. With a 7 gallon supplement tank attached. My crew won't even run this one out of air



Thats a bit low I think. I am thinking mine is about 14 CFM at 135 PSI. Two stage compressor.
 
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