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Thread: How to fix twist in a post vise hinge plates?

  1. How to fix twist in a post vise hinge plates?

    I have a 4" post vise that I am fixing up. It works fine, except that the hinge plates are wallowed out and twisted. As a result the movable jaw is offset from the fix jaw by 5/8" and it's top is at a angle. Unless the jaws are tightened, it has almost a 1/2" of lateral movement.

    My thought is to heat the plates with a O/A torch and hammer fit them to the movable jaw. Then twist the whole assembly into alignment.

    Thoughts?

    Thx's, Fred.
    Last edited by Fred Bryant; 08-28-2011 at 07:48 PM. Reason: Can not spell.

  2. #2
    Join Date
    Mar 2011
    Location
    Maple Valley, WA
    Posts
    339
    Sounds about right. The other option is replacing them.

  3. #3
    sounds about right, but a photo would help with suggestions.
    Keep on Forgin

    The difference between stupidity and genius is that genius has its limits.
    Albert Einstein

  4. #4
    Join Date
    Apr 2010
    Location
    Chimacum, Washington
    Posts
    180
    ive seen some vices where the two plates were welded to the main frame of the vice and some that are just bolted. if they are just bolted i would take them off and throw them in the forge and straighten them out that way. a picture would be helpfull as stated before.

    good luck

  5. Thx's, will give it a try tomorrow.

    Yes, I really should have posted a picture, but did not have one at the time.

    I appreciate the help.

    Thx's, Fred

  6. #6

    Post vise repair

    Are you certain it is the plates and not the hinge pin? I have a vise that always shifted as I was tightening it down. After years of dealing with it and finding no other source for the problem, I extracted the pin and noticed a groove worn into it, almost halfway through. Fixing the pin fixed my problem.

  7. #7
    Join Date
    Sep 2010
    Location
    Poulsbo, WA
    Posts
    148
    Quote Originally Posted by Paul C View Post
    Are you certain it is the plates and not the hinge pin? I have a vise that always shifted as I was tightening it down. After years of dealing with it and finding no other source for the problem, I extracted the pin and noticed a groove worn into it, almost halfway through. Fixing the pin fixed my problem.
    Ooh Paul, I have that exact issue with my vise, I'll check that out. I also need to re-weld the nut that had been welded to the front of my vise. Here is a pic.

    Click image for larger version. 

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    I figure the vise was rebuilt at one point with a new screw and they welded a big square nut right behind the tightening knuckle and mounted the rest of the screw hardware on the back. It's quite a bit longer than most compete vises I've seen. It still works nicely though, except for the pivot on the jaw when tightening. I think I'll likely have to cut the bolt to get it out, but I can replace it too.

    Regards,
    Tim
    Let us make a special effort to stop communicating with each other, so we can have some conversation.
    Mark Twain

  8. #8
    Keep all moving parts lubed.

  9. #9
    Join Date
    Aug 2010
    Location
    Victoria, B.C. Canada
    Posts
    122
    Good Morning,

    What part of the BIG Island (North Hamerrica is an Island, yust a little bigger than Statten) do you hang your hat? Anywhere someone can take a look and see what really is the problem? The problem with these Putors, Kannn't Seeeeaa!!!!

    ciao fur now,
    Neil
    As long as we are above our shoes, We know where we are.

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