Prentiss Vise Nut Removal

I’ve received a few questions about how I got the lead screw out of my vise.  I figured I’d throw up a quick post with a few pics.

I dug back in to some old pics and found one showing the ring or nut.  I’ll call it a ring for now.  The ring fits on the lead screw and its purpose is to carry the moving jaw when you open the vise.  The ring on the vise is a special kind of ring with what I’ll call fingers on it.

The lead screw has a small depression in it which is shown below.  The ring is held in position by hammering one of the fingers into the depression.  This keeps the ring from sliding or rotating with the lead screw.  To remove the ring requires cutting off the finger that is bent down into the depression.  I used a Dremel tool with a cutoff disk but I’d imagine a cold chisel or burr would work as well.  Once the finger has been removed the ring will slide down the lead screw which allows the lead screw to be removed from the moving vise jaw.  Its possible other vises may have more than one finger hammered down.  So, look carefully.

When you’re ready to put the ring back on you’ll need to hammer one of the other fingers down into the depression using a pin punch.

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6 Responses to Prentiss Vise Nut Removal

  1. Thomas Joseph McKinley says:

    Thanks David ! That was good ! I’m also presently working on a Prentiss, 19 1/2 b pivot vise with a broken main nut , do you have any suggestions ?

    • davidjbod says:

      Depending on how it is broken you may be able to have it repaired. I’d have to know more about how it broke. A better option might be to have a new one made at a machine shop.

      • Thomas Joseph McKinley says:

        I was trying to get a new one but made ,but 6 different people I’ve talked to ,they can’t help , I guess it’s so old and to hard to duplicate in regards to the 7/8-4 flat Acme type threads

      • davidjbod says:

        Hmm that’s unfortunate. Mine doesn’t seem that complicated. Can you send some picture of the broken nut to somanyhobbiesblog@gmail.com? If it seems like something I could make maybe we can work something out. I’d hate to see a Prentiss scraped.

      • Thomas McKinley says:

        Wanted to send photos and I thought I did but e bay blocked it I guess

        On Aug 21, 2018 12:02 AM, “A Blog Devoted to my Many Hobbies” wrote:

        > davidjbod commented: “Hmm that’s unfortunate. Mine doesn’t seem that > complicated. Can you send some picture of the broken nut to > somanyhobbiesblog@gmail.com? If it seems like something I could make > maybe we can work something out. I’d hate to see a Prentiss scraped. ” >

      • davidjbod says:

        I received your pictures through email and have replied.

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