[TheForge] bolt thread repair tool

[Peter Fels & Phoebe Palmer]

I’ve faked acme style square threads by eyeball and hand ( chisel, hacksaw and files) and the product was really crude. It sorta worked but nothing to be proud of. Someone with a better eye and hand could have done lots better.

On Feb 23, 2015, at 4:32 PM, jerry Frost <akfrosty at mtaonline.net> wrote:

That's true Pete, it wasn't till after the Civil War standardization started
becoming the norm. well . . . IIRC. I can see it now, a treadle lathe and
hand feeding the cutter using a tracer or similar. Heck if the lathe had a
feed screw it could've been hand made too.

It's starting to sound like doing the repair like one of the older books.
Wrap the screw with sq stock that's been forged to fit in the relief. Then
wrap this piece around a turned bar and forge braze the two together.

Hand filing is apprentice work. for 1/4" width cut a strip of paper, hide,
etc. 1/4" wide and wrap it helically around the shaft and scribe in the gap.
Then using dividers scribe the width and put the apprentice to work.

Dies aren't terribly difficult to make by hand but I don't know about a feed
screw die. I'm thinking the bits would have to advance incrementally or a
person would have to have a heck of a piece of machinery to turn it. Taps
would be similar though a LOT easier to make.

Hmmmm.

Oh, this is a seasonal thing I've been doing for a while now. Usually we're
still getting single digit or sub zero lows and everybody is Jonesing for
spring and after getting a little friendly grief about being Frosty at work
one day I changed my handle to Toasty. It's a little wish for an early
breakup, not that it's necessary here this winter but seeing as how the
lower 48 is getting a winter butt kicking I'm making the change for you
guys.

Toasty
-----Original Message-----
From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Peter
Fels & Phoebe Palmer
Sent: Monday, February 23, 2015 12:09 PM
To: Blacksmithing List Sponsored by ABANA
Subject: Re: [TheForge] bolt thread repair tool

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.


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