[TheForge] Re: Welding cast iron

[Peter Fels & Phoebe Palmer]

Harry;
I was given a large bench vise that was stripped. Couldn't find a 
matching acme thread for it.
I ended up going to MSC or Mc Master Carrand buying a pair of acme nuts 
and a matched 1" threaded shaft. After a bunch of cutting, welding and 
grinding, i now have a working vise....But because i welded the nuts to 
the carrier, they are pretty well annealed. Sooner or later , someone 
will put a big cheater pipe on the handle and that'll be the end of 
that....pf
IowaHarry wrote:
> Ron, I haven't cast anything but a line since high school. That would 
> require a whole new side line to this hobby of making things really hot. 
> I'll keep that open as an option. I'm leaning towards a complete 
> replacement in steel. There must be threaded acme nuts of this size 
> available somewhere.
> 
> Harry
> 
> Ron Childers wrote:
>> You could cast a brass nut
>>
>> -----Original Message-----
>> From: theforge-bounces at mailman.qth.net
>> [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Peter Fels & 
>> Phoebe
>> Palmer
>> Sent: Monday, May 19, 2008 6:52 PM
>> To: Blacksmithing List Sponsored by ABANA
>> Subject: Re: [TheForge] Re: Welding cast iron
>>
>> Hi Harry;
>> You are the same sort of sucker i am..putting more dollars into 
>> repairing a POS than a good,new one would have cost in the first place.
>> It's one of my areas of expertese.
>> Having  braised, too late to arc with Ni rod.
>> The faces to be  braised need to be ground to bright metal, degreased, 
>> then ( using cast iron braising flux) and pre-wet ( buttered) with 
>> braising rod. Jig them in place and do the fusing passes. cool slowly.
>> Then apply the " look honey, "I gotta buy an adult vise....it's a 
>> POS....pf
>>
>> IowaHarry wrote:
>>  
>>> Hi Mike,
>>>
>>>    The nut is, as you said, the female threaded part the vise bolt 
>>> pulls on. On this vise It was a casting that is rather "L" shaped 
>>> with a bolt to hold it in place going into the base. There is also a 
>>> nubbin in the base casting that the "L" would be up against on the 
>>> side of the pull so not all of the load would be on the bolt. Yes, 
>>> buying a new vise may be what I do but I still intend to fix this 
>>> one. That will probably be the line I use with SWMBO. "Look honey, 
>>> it's broke, I gotta buy a new one".
>>>
>>> Harry
>>>
>>> Mike Spencer wrote:
>>>    
>>>> IowaHarry wrote:
>>>>
>>>>  
>>>>      
>>>>> ...broken the vise nut in my chinese vise shaped object (bench vise).
>>>>> [snip]
>>>>> The crack was on the diagonal behind the nut proper so we cut the
>>>>> nut away from the base completely and made a black steel base to
>>>>> braze to.
>>>>>             
>>>> Is the nut -- the female threaded part -- integral with the body of
>>>> the vise?
>>>>
>>>> I forget just exactly how my bench vise is, but IIRC, the nut floats.
>>>> That is, it's a separate part and is held to the base loosely with a
>>>> pin or bolt or the like.  If the nut is actually part of the base
>>>> casting, a sort of mushroom affair that sticks up into the axial line
>>>> of the screw inside the movable jaw, that sounds like a really weak
>>>> design. And if you reattached it with a braze and didn't get perfect
>>>> alignment, that would subject it to even more stress.
>>>>
>>>> If that's the case, you might look first at a higher quality, old
>>>> bench vise to see how it's made and then try building some kind of
>>>> affair that would float the nut.
>>>>
>>>> Or maybe I don't understand just what your arrangement is.
>>>>
>>>>
>>>> - Mike
>>>>       
>>
> 
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