1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Air tools - rotary union

Discussion in 'Garage / Workshop' started by soggyBottom, May 3, 2024.

  1. May 3, 2024 at 10:04 AM
    #1
    soggyBottom

    soggyBottom [OP] Well-Known Member

    Joined:
    Sep 19, 2018
    Member:
    #266818
    Messages:
    1,763
    I bought a 50' retractable air hose from harbor freight. I love the thing but from the day I bought it, it leaked. After opening it up, it looks like a poorly designed part. Looking at picture 3, it's not exactly a precision part. I'm guessing some thick grease could help a little but I don't think it's going to fix my problem.

    The in and out are just regular old 3/8 NPT. The only one I found so far is $85. It looks like it's a bit overkill for what I need. Is there something else I can use that is a little cheaper but better than the garbage that I have?

    https://www.amazon.com/Mosmatic-40-...56277&sprefix=3/8+rotary+union,aps,124&sr=8-6

    PXL_20240503_165225931.jpg
    PXL_20240503_165237494.jpg
    PXL_20240503_165333230.jpg
     
    Last edited: May 3, 2024
  2. May 3, 2024 at 5:05 PM
    #2
    soggyBottom

    soggyBottom [OP] Well-Known Member

    Joined:
    Sep 19, 2018
    Member:
    #266818
    Messages:
    1,763
    I polished the inside with a Dremel and rouge. Added grease and now it's fine.
     
  3. May 3, 2024 at 5:17 PM
    #3
    DES2009

    DES2009 Minister of Truth

    Joined:
    Jul 22, 2014
    Member:
    #134426
    Messages:
    1,000,471
    Gender:
    Male
    Southeast Louisiana
    Vehicle:
    2017 MGM Limited
    I'm a Millionaire! One Million Posts!!
    Did you get the Merlin on sale a few weeks ago for $69.99?
    I bought one then. It does lose pressure, but slowly. Too slow to hear it leaking, and it takes about 2 days to depressurize my 4.5gal Dewalt.
     
  4. May 3, 2024 at 6:09 PM
    #4
    soggyBottom

    soggyBottom [OP] Well-Known Member

    Joined:
    Sep 19, 2018
    Member:
    #266818
    Messages:
    1,763
    It's a central machinery. After polishing and greasing it, soapy water shows no leaks. I don't know if the polishing did anything. At the very least, you should try grease.
     
    DES2009[QUOTED] likes this.

Products Discussed in

To Top