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Thread: 1/4" Air Tubing

  1. #1
    Join Date
    Mar 2004
    Location
    northern indiana, usa
    Posts
    95

    Default 1/4" Air Tubing

    I'm missing something...............I'm installing an air cylinder to raise and lower my drill press table. As speed is not important I'm using 1/4" flexible tubing. I bought NPT brass adapters for 1/4" tubing which included an "adapter" to place inside flexible tubing to allow proper sealing. My issue is the adapter is designed to tubing with an inside diameter of .190". Thus far the only tubing I can find is polyethylene tubing with a ID of .170". While I can force the adapter into the tubing it is then too large to pass through the ferrule and nut. Any ideas of what tubing I should be looking for?
    BudB

  2. #2
    Join Date
    Nov 2006
    Location
    Jersey City, NJ
    Posts
    1,268

    Default

    I don't understand, McMaster has dozens of different kinds of 3/16 ID 1/4 OD flex tubing. Last time I messed in this sandbox I bought 1/8 npt to barb fittings and used crimp on sleeves or those spring wire clamps.

  3. #3
    Join Date
    Jun 2014
    Location
    Hurley WI
    Posts
    256

    Default

    Try air brake tubing from an auto/truck parts store.

  4. #4
    Join Date
    Aug 2018
    Location
    Loveland,CO
    Posts
    65

    Default

    Or try U S Plastics

  5. #5
    Join Date
    Jan 2005
    Location
    Buffalo NY
    Posts
    4,172

    Default

    All the kool kids are using push-to-connect
    tubing fittings. Some good ones are Legris
    and SMC. Parker makes them too, but they
    are all brass and kind of bulky.
    I like to get them from McMaster Carr or
    AutomationDirect. No inner tube thingy
    is required.

    -Doozer

  6. #6
    Join Date
    Oct 2002
    Location
    Saskatoon, Saskatchewan
    Posts
    2,928

    Default

    If only there was a way to make a ferrule...

  7. #7
    Join Date
    Jan 2003
    Location
    Deep in the Heart of Texas!
    Posts
    7,793

    Default

    I'm using the push connectors for my mister setup. So far it's held up to 70+ PSI but it hasn't gone through a hot summer cycle yet. The only thing that bites me is all the fittings and tubing are METRIC. I got everything off eBay and Amazon.


  8. #8
    Join Date
    Mar 2001
    Posts
    216

    Default

    NO inside fitting just use push to connect like Doozer says may want to get hose for air brakes or air bags.
    Ed
    Agua Dulce, So.California
    1950 F1 street rod
    1949 F1 stock V8 flathead
    1948 F6 350 chevy/rest stock, no dump bed
    1953 chevy 3100 AD for 85 S10 frame have a 4BT cummins motor, NV4500
    1968 Baha Bug with 2.2 ecotec motor, king coil-overs,P/S

  9. #9
    Join Date
    Oct 2014
    Posts
    365

    Default

    "Push to connect" are so fast and easy I can't see messing with anything else that takes a bunch of small parts unless you have a special application that requires a more firm or secure connection. I have used "push to connect" a lot, on the machines I used to maintain when working, and never had a problem. Even saw some in Lowes. Read McMaster for compatible types of tube and fittings.
    Last edited by wdtom44; 01-29-2019 at 10:04 AM.

  10. #10
    Join Date
    Aug 2009
    Posts
    5,990

    Default

    Isn't using air going to be spongy as far as movement?

    JL................

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