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  • Zerks

    I have a small pile of mostly original zerk's from the Indians that I would like to reuse. There are a couple of oddballs and chrome plated ones. First question, other than testing it with a gun, how would I know if an 80 year old zerk is good or bad? These all look great, with no major corrosion that is noticeable on the inside. After soaking them for a few days in solvent, I thought I could use the tip of a blowgun to possibly get the zerk to open. Even at 120psi, I got no airflow through the ones I tested. Is the only option to mount them on a hole and just use a grease gun?

    Also, can I cad these as is? Wasn't sure if the cad process had to take place prior to the ball and spring being assembled.


  • #2
    I believe a standard grease gun will 'generate''(?) more than 120 psi. Maybe 'mount' each Zerk in a vice (use a strip of copper to protect the Zerk) and try the grease gun?


    • #3
      I'd like to ask also, Folks,..

      What were they 'correct' for if there was no staked-in ball and spring?

      Thanks in advance,

      PS: Ain't it spelled 'zirque'?
      Last edited by T. Cotten; 01-06-2022, 07:27 PM.
      AMCA #776
      Dumpster Diver's Motto: Seek,... and Ye Shall Find!


      • #4

        You mean like: Cirque du Soleil? The Las Vegas acrobatic act???

        I don't know.
        If we're going to start grading spelling or grammar I'm Sunk.

        Starklite lists as: "Zirc";
        Jerry Geer as: "GREASE FITTING" and
        Jacob Junker covers all the bases with: "Zerk/Grease fitting"


        • #5
          ...Wikipedia says:
          "The patent for the Zerk fitting was granted to Oscar U. Zerk in January 1929, and the assignee was the Alemite Manufacturing Corporation.[1] Alemite had already been marketing, since 1919,[2] ball check valves to accept grease supplied under pressure from a grease gun, such as for car and truck chassis lubrication points, both for OEM installations and for aftermarketupgrade kits which would screw in as replacements for stock grease cups, but Zerk's fitting was an improved style, less vulnerable to dirt and more forgiving of angled approach. Today, many companies make these grease fittings."

          Pisten Bulley is Harry Roberts in Vermont.


          • #6
            Originally posted by pisten-bully View Post
            ...Wikipedia says:
            "The patent for the Zerk fitting was granted to Oscar U. Zerk in January 1929,
            So let me guess, Folks,...

            The zipper was invented by....


            Still wonder about ones with no ball check, correct thread, probably from Milwaukee machines.

            Perhaps pre-'29?

            Last edited by T. Cotten; 01-07-2022, 06:22 PM.
            AMCA #776
            Dumpster Diver's Motto: Seek,... and Ye Shall Find!


            • #7
              I appreciate the input. Considering that a grease gun can put out 3000psi+, I think I will just run a test like Paul suggested and then clean them up again so I can throw them in the CAD pile, assuming I can CAD plate them. I was worried about CAD sticking to the ball, but maybe it is not a big deal.

              Cotten, I can't help you. Or do you know the answer and are just quizzing us?

              A zerk without a ball and spring...wouldn't it just be called a nipple?

              In learning that Zerk invented the Zerk, I also learned that it is a myth that Crapper invented the Crapper. Can't tell you how many times I heard about that one over the years.