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Lubricated airline questions

DerStig

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Jun 15, 2015
Messages
441
I have an air filter/regulator/lubricator which I use for my lift and rolling jack. The first question is, the manual is very vague about how much lubrication to use. It says to use 1 turn (there is a dial) for each SCFM. It doesnt say how to calculate this.

The second more interesting question is, I bought hose reel and the way I want to use this is to add 2 quick connects before and after the lubricator unit. This is so that if I need to use air tools that requires lubrication I connect it to the after quick connector for anything that shouldnt have lubrication like tire inflation, I use before. Thats all fine but it just occurred to me that once a line is used as a lubricated line, can it be disconnected and used as non lubricated line? In other words, wont there be left over lube in my hose reel all the time? If yes, how much of a problem is that when it comes to tire or ball inflation or just general cleaning things with air?
 
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DerStig

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Jun 15, 2015
Messages
441
Are there any tools where oil is not to be used?

What is the problem if I used an oiled line to inflate tires?
 

matt_i

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Mar 14, 2008
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Painting, or surfaces you intend to paint but are "blowing off" with air can't have the oil.

I think tires are oil-resistant but I never would want to test that out by having any more oil mist than absolutely necessary going into it.

I would put your lubricator on a shared line feeding the lift and jack. Tee off on the "clean" side of that for all other uses. You can certainly plumb: filter/regulator - tee - lubricator.

If you are worried about air tools like impact wrench, air ratchet, die grinder, etc, I would do like me :) and put 1 drop of air tool oil into the male quick connect stud before each use. Unless you are running a production line where the air tool is going to be used 8+ hours every day, I think the amount of airline lubrication you need in a home shop is pretty small.
 
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DerStig

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Jun 15, 2015
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Understood thanks.

The other question I have is how much oil the lubricator should be adding. The manual says per 10 SCFM it should be adding 1 drop per minute.

My compressor has a 5.1 CFM at 90 psi. I calculated that to be 12.57 SCFM using a formula I found online assuming 60F ambient temperature. I dont know if that conversion is valid or not.

Also, using that SCFM figure and listening the manual, I did turn at the knob in the lubricator body one full turn, but what I m seeing is its dropping much more than 1 drop per minute its more like 1 drop per 5 seconds or so. I dont know whether unit is faulty.

This is the unit I have: https://www.amazon.com/gp/aw/d/B0170TY9WI/ref=ya_aw_od_pi?ie=UTF8&psc=1
 
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DerStig

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Jun 15, 2015
Messages
441
I put 3-5 drops into the air tool inlet for 8 hours of use.

I think thats fine, I just dont know how much to use for the lift/rolling jack. I dont know if my cfm to scfm conversion was right.
 
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