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Air hose quick coupling sizes .....

Crazy Horse

Crazy Horse

Well-known Member
Time to pull out the kitchen fridge and do the annual cleanup underneath and deal with all the dust and stuff that gathers around the coils and everything else at the back and underneath. So I bring in my little compressor from the back shop and then am reminded me of the issue with quick connect sizes (the one in my garage uses different size which is my fault) that I have dealt with in the past, and still do now and then. So I did a bit of Googling, this link below here explains it all pretty well I think. One of the problems I remember is that the fittings are not always marked with the appropriate letter code and visual comparison is sometimes iffy. Pretty good reading, and some discussion forum info at the end.
Air line connections 101 poke here .....
 
Thanks for the information. I never did know why there are different designs. My old college room mate from Waterloo Ia gave me a female universal coupler he claimed was the best in the west because it was used in the Deere factory. Well Deere must have had a lot of leaky hoses if their luck with this coupler was as good as mine. The two tools in my shop that wear out the male coupler the fastest are the air chisel and the needle scaler.
 
I had two that looked the same but would not hook -up Come to find out you need to know what kind to get .Chinese should be avoided.
 
Something I have found that helps is to put a short leader hose on the most
used tools, especially the ones that vibrate, like sanders, chisels, impacts,
etc.

The leader helps isolate the coupler, makes it last longer.

Steel couplers last longer than brass also.
 


Take a pic of the male that works, then go to the hardware and buy a few and whatever number of females that you need. standardize.
 
I have a lot of smaller couplers I use in the shop. I use the 3/8 high volume for work since we often ran three framing or roofing guns at a time. Then I bought a 3/4 impact wrench and use the high volume on that. I have a couple adapters in the tool box to go either way.
 
Harbor Freight sells an almost fits all connecter . That takes care of most of the auto style
 
My Runnings store used to put out a universal female coupler made by Pioneer (the hydraulics folk) that has worked well for me, it takes all the types I put in it. I havent seen one in a few years at Runnings, but I would assume are still out there somewhere? I bought one every time I saw one on the shelf, got 3 or 4.

Paul
 
Buy high flow couplings ( bigger ID.) and you will be so happy the way all of your air tools will now work. Also get rid of any regulator. I replaced all of my fittings with High Flow and am very happy I did.
 
They have Industrial and Auto at HF, clearly marked so that you can setup for one style or the other. Close examination of the male will tell you if one you are buying fits your females then just check the shape and you're good to go when purchasing new. I think theirs have marking on the side to identify the style as I recall.
 
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