[TheForge] bolt thread repair tool

[Peter Fels & Phoebe Palmer]

Jerry, on the couple of screwed up  post vise vice pivot bolts i’ve rescued,
they were neither standard thread nor diameter.
I’m a guy who picks up bolts and nuts where ever i saw them abandoned
for around 50 years, and my misc bolt collection is pretty extensive,
but after hours of rooting around in my boxes, buckets and bins…no matches.
Gotta suspect they made their own thread taps and dies pretty commonly back then.
Somewhere in my collection are some very crude, hand made thread dies.

On Feb 23, 2015, at 12:22 PM, jerry Frost <akfrosty at mtaonline.net> wrote:

If you're talking about dressing an Acme thread you're talking about a different bread of cat. Square and feed screws are different for a reason, they aren't supposed to lock through stretch like nuts and bolts.

Cleaning buggered threads with a thread file literally takes a few seconds and it's right when you're finished. Trying to clean them with a triangular file is a long difficult process with questionable results.

You needed to straighten the bent screw first, then chase the threads to make the repair you mention. It'd probably be almost easier to just cut a new one. I never liked cutting threads on a lathe probably because I'm not good at it. Dad could do it in his sleep. Maybe I should've practiced more eh?

Jer

-----Original Message-----
From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Bruce .
Sent: Sunday, February 22, 2015 3:09 PM
To: Blacksmithing List Sponsored by ABANA
Subject: Re: [TheForge] bolt thread repair tool

Well, two reasons.  Because you can.  And because filing threads can be a drag.

The post vise bolt I fixed with a triangular file was bent and miserable.
I tried chucking it into the lathe, but it was far too bent for that.  I did spin it slowly in the lathe while using the triangular file -- that worked nicely.



Bruce
NJ

On Sun, Feb 22, 2015 at 5:45 PM, Peter Fels & Phoebe Palmer < artgawk at thegrid.net> wrote:

> I can imagine that if you have an extra tubing cutter, you could 
> regrind the axle so as you rotate it it would conform to different 
> thread pitches, and you could regrind the blade to the 60*(?) thread 
> angle required, though it doesn’t resolve parallel tracking problems entirely.
> But why?
> 
> On Feb 22, 2015, at 8:30 AM, Bruce . <freemab222 at gmail.com> wrote:
> 
> I wonder whether a tubing cutter or pipe cutter would do the same.  
> Might have to re-mount the cutting roller on a smaller pin so it can 
> rotate slightly off-axis.  I'll have to give it a try.
> 
> I don't have much use for it, but I did have to clean up the pivot 
> bolt on an old leg vise a few months ago and it might have come in handy for that.
> I used a triangular file, which worked.
> 
> Bruce
> NJ
> 
> On Sun, Feb 22, 2015 at 11:02 AM, Rob Fertner <rfertner at cox.net> wrote:
> 
>> 
>> I've mentioned this website before. They've recently posted about a 
>> tool that may save the threads on a bolt. This may come in handy 
>> with old
> stuff
>> you're repairing and you don't want modern looking bolts to spoil 
>> the
> look.
>> 
>> http://toolguyd.com/threadmate-tools-repair-just-about-any-threads/
>> 
>> Rob
>> Wichita, KS
>> 
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