Originally Posted By: dogwood1300
Originally Posted By: supton
I got a cheapie oil-less compressor from Home Depot. 20 gallon? I forget. I'm not sure I'm 100% happy with it. For inflating tires it's great; but so far I haven't been real impressed with its ability to run an HF impact wrench. Which may be a second source of frustration.
IIRC, oil-less compressors cost less, but make more noise, and are apt to wear out faster.
I recall being told to get 3/8's line, not the cheaper 1/4". 1/4" is probably ok for tire inflation, but it won't support an impact wrench. I have a 50' 3/8's line, and I think it's too long to run an impact--too much pressure drop (although it could be the compressor--I have not had a chance to try a shorter line). But what makes more sense: long air line, or long extension cord? These compressors aren't low current.
I still wind up breaking loose bolts at the moment by hand. Right now my compressor is used just for tire inflation. Good thing it was a gift.
Wonder which HF impact do you have?
The
Earthquake 1/2" impact wrench is pretty good, and can be had
for $70+tax
As far as air pressure and CFM, it might help to measure/monitor what the pressure
is at the end of the hose where the impact is, instead of reading from the compressor.
For 50-ft hose, I'd bump up the pressure at the compressor.
And what car do you have that you tried to take the lug nuts off?
With a Makita mac700 , Goodyear 50ft 3/8" hose, and a HF 1/2" dual-hammer impact (not
on their website right now), I was able to take 5 lug nuts off from a Honda (80 ft-lb
spec) before the compressor kicks in.
HTH
That doesn't really mean much. If a nut is tighter or seized it takes more air,so that's not much of a guide really.
I make my living with air compressors. 5.5 hp twins and triples. But my home compressor is a twin tank rigid. Its a wheelbarrow type but small and oiled.
The tanks hold very little air however I found a dead compressor,20 gallon tank. I stripped it and use it for extra capacity. I never run out of air. I regulate down to 50 psi for impacts and let er go. The compressor starts pumping as soon as there is less than 110 in the tanks. I've got 3 nipples just in case.
So a small oiled pump can do big jobs with a supplement tank which can be found cheap or free.
I do the same on my crews.
I leave the compressors in the truck or cube vans then run a 10 gallon tank to the floor with 4 nipples welded on going out,and 2 nipples coming in. Capacity is key. The pumps can't keep up regardless but we only need max output to staple off a wall or roof.so we aren't gong full blast for long,a few minutes maybe.
Spikers shoot a couple nails,then move,couple nails then move ,so the pump has no problem keeping up.
I've engineered air systems so that we can run 10 guns off a 12 cfm compressor and no one lacks air. And the pumps are always turning anyways so I designed a system so that very little air is bled off into the atmosphere,so no wasted strokes.