[TheForge] post vise repair

[Jerry Frost]

This is like using a grade 3 bolt where a grade 5 is 
called for. Acme threads come in similar if not the 
same grades of hardness/toughness. Some acme threads 
are feed screws and under little stress, others are 
used as jack screws and have to be able to hold the 
corner of a house up.

A vise needs something closer to a jack screw than a 
feed screw. That is what I believe Dan is referring too 
as "grade."

And simply replacing the screw and nut with an acme 
product of the appropriate or better grade is exactly 
what I'd do.

Frosty
-------------------------------
If it ain't forged
it ain't real.
Wrought iron is.
The FrostWorks

Meadow Lakes, AK.

From: <schade at acegroup.cc>


> Dan,
>
> Acme threaded rod and nuts, as well as any other 
> threaded product, are
> made to fit each other following any number of charts 
> and
> specifications.
>
> There are threaded parts that are designed to 
> interfere (like lock
> nuts) but for the most part things are made to work 
> together. If they
> don't they are defective and I return for credit or 
> good parts.
>
> If you know of any exceptions I would be interested 
> in reading your
> sources.
>
> Bob
>
> ps. I am talking about the normal everyday parts 
> referenced in the
> preceding link to McMaster Carr and other standard 
> suppliers. Not some
> spatial kryptonite hardware that Andy worked on 
> during his stint as a
> nuclear engineer building the Nautilus. Top secret of 
> course.
> __________
>
>
> On Apr 24, 2009, at 10:46 AM, dan tull wrote:
>
>> I found there are different grades(types) of acme 
>> threads. Some seize
>> upon
>> tightening.
>> Ask before you buy.
>>
>> ----- Original Message ----- >
>>> Using acme rod and nuts is the way to go. Both are 
>>> available from
>>> McMaster-Carr.
>>>
>>> http://www.mcmaster.com/#acme-rods/=1l2xdq