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Thread: Need help with broken a Vise Nut

  1. #26
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    Re: Need help with broken a Vise Nut

    Quote Originally Posted by G-ManBart View Post
    I understand lots of folks think it will work, but I have yet to see anybody pull it off successfully. I don't know if there's a difference because the part is actually ductile iron, not cast iron, or because it's simply a thin part, but I haven't seen an old vise show up with a brazed nut that was still in service, and I've seen countless other types of brazed repairs on vises that were clearly done a long time ago and held. Along those same lines, I've had so many people contact me after trying to braze a nut unsuccessfully that I lost track a long time ago...they break it, try fixing it, it fails again and then they send me a note looking for a source for a replacement part. Maybe it's a coincidence of epic proportions, but I really doubt it.

    I've stick welded vises with nickel rods, brazed them, TIG brazed them and TIG welded with two different Inconel filler wire and the best results have usually been using Inconel. I prep the area to white metal using a carbide bit, then use just the arc to cook the carbon out...heat, stainless brush, repeat until the black soot stops coming out, then lay in a root pass and build off that. I have some aluminum bronze TIG wire I'm going to try next. I'll have to add nickel silver to the list.
    PM me your address and I'll send you a couple sticks of Nickel Silver to mess with If interested. 312 Stainless as well if you want to mess with it too.
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  2. #27
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    Re: Need help with broken a Vise Nut

    Quote Originally Posted by frede162 View Post
    Yup that's how I broke the mine. I was pressing a bearing out of a phenolic pulley used on a cable pulldown fitness machine. No cheater bar, and only moderate force, but that is indeed how I broke the previous braze on mine.
    Sorry I was meaning to send this to G-Manbart
    Thermal Arc 320SP ( Lorch )
    Cobra Pythons
    Thermal Arc 300 AC/DC ( Sanrex )
    ESAB 301i AC/DC ( Lorch )
    Thermal Arc 161STL ( WTL )
    Thermal Arc 190S ( Sanrex )
    Cut Master 82, 42. Cut45 ( WTL )
    Victor Gas Apps.
    Boxes and boxes of welding crap.

  3. #28
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    Re: Need help with broken a Vise Nut

    As a future reference most vices have an Acme or a square thread, square thread is largely obsolete, the other issue is that it may be a multiple lead thread, 2 to 4 "starts."
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  4. #29
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    Re: Need help with broken a Vise Nut

    Quote Originally Posted by CAVEMANN View Post
    As a future reference most vices have an Acme or a square thread, square thread is largely obsolete, the other issue is that it may be a multiple lead thread, 2 to 4 "starts."
    Thanks for that helpful observation!

  5. Likes CAVEMANN liked this post
  6. #30
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    Re: Need help with broken a Vise Nut

    Quote Originally Posted by frede162 View Post
    I have a DESMOND STEPHAN SIMPLEX 31s vise that belonged to my wife's grandfather. Unfortunately the main nut (spindle) has broken. I'm a woodworker and not sure it can be to fabricated or welded. As seen in the photo the nut was repaired before....looks like it was brazed with brass??

    Attachment 1724787
    I use Everdure and a TIG torch, electrode Straight polarity, DCEN. I do melt the base material some I don't just coat it. I have welded vises that have broke and when we did the same thing again it didn't break, haha.

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  7. #31
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    Re: Need help with broken a Vise Nut

    Well back 80"s me was main welding guy of shop, did lot repair on every type metal came in door always welded cast with nickel rod and sometimes brass ,would tell guy that couldn't tell or guarantee it would hold or not until started welding on it ,lot time if newer cast Chinese metal it wasn't wort trying , one day welding rod salesman pull up in 76 ford Pinto, my boss man sent him down to shop to me (office was on second floor) salesman told me if boss man bought welding rod from him each welder in shop got nice Buck knife!!! he got my attention ,, so he brought cast iron head place it on welding table told me go get piece scrap steel plate behind shield? me thinking can't weld cast to steel? so pick 3/16" flat bar about 10" long he gave me his 1/8" cast iron rod told set machine amp as was gong weld 7018 , so tack it on head and welded it like 7018 knock the flux off was most beautiful bead every put on cast!!!!, so he instructed me take hammer bend it over beat hell out of it until beat 180 degree ,, me was smiling!! walk the guy back upstairs told my Boss man that was great rod!(and wanted that Buck knife!!)so waited few hours seen boss man ask him if bought that rod from him? he said guy was asking like $500 for 10 lb guy went out back door never ask what brand rod it was or ever seen the Pinto again!! so that my story ,, just seen this cast rod on U-TUBE "Muggy Weld "there 2 rod the first like clean dirty impurity out then finish with 2 rod looks like winner!!!worth checking

  8. #32
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    Re: Need help with broken a Vise Nut

    Thanks for that helpful observation..

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