[Shop-talk] adjustable thread dies

[Pat Horne]

See if you can find a 12TPI thread file. You start filing where the threads are mostly good & keep filing over the damaged threads until you reach the end. If you want to, you can then run a standard 12-24 die onto it afterwards.  I got a set of SAE & metric decades ago from J. C. Whitney - May they Rest In Peace. 

Peace,
Pat

Pat Horne 
We support Habitat for Humanity


On Sep 17, 2022, at 1:55 PM, john niolon <jniolon at att.net> wrote:


Help machinist and mill wright type people
 
I have a output stud in an alternator case that the beginning threads are stripped/galled/messed up from someone trying to force a metric nut on it.  the stud is about
 5/8"  long and the majority of the threads are good.
 
I can't seem to get a 12-24 die started so I know it will true up the existing threads.   I see they make adjustable dies on the net... can I use that to slide over the bad threads 
 
the adjust the bolt in the die to sit right on the stud then thread it back over the bad threads ??   I just hate to send 20 bucks for the die if it won't do what I want...
 
Any experience doing this ??
 
thanks
john
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