[AT] OT: Cast iron work on a replica cannon

[Stephen Offiler]

I live and work in both worlds, and I have no problems with metric other
than the need to have two whole sets of wrenches and sockets, but that was
also true 40+ years ago when I started collecting, so I'm good.  I'm not a
big fan of the idea to convert the whole USA to metric.  While that was
tried and failed back in the '80's, it still rears its ugly head now and
again.

Anyway, back to the cannon and Spencer's comment.  Before I responded to
Steve Allen the first time, I checked metric.  Standard sizes at 14mm and
16mm.  Coarse is M14 x 2.  Major diameter is 0.551" which is slightly
smaller than the 9/16-12 he was considering.  M14x2 tap drill is 12mm which
is 0.472" which is too small to be much good if trying to clean up a
stripped 1/2-13.  So we move to the 16mm.  Here, the trouble is that 16mm
is 0.630" which is just a hair above 5/8" and Mr Allen already stated that
he could not go as far as 5/8" due to something interfering (or whatever it
was, I forget).

SO


On Fri, May 3, 2019 at 10:26 AM Al Jones <farmallsupera1 at gmail.com> wrote:

> Metric is the work of the devil...…..
>
> Helicoils are wonderful.  Very easy to do and they WORK!
>
> My white demonstrator Super A that I have been tinkering off and on
> forever had four badly stripped holes in the torque tube.  Somebody had
> tapped the 5/8" holes out about 7/8 or so and it was BAD.  There wasn't any
> threaded inserts that I could find that would be direct replacements.  A
> machine shop friend of mine was nice enough to make a set of inserts, kind
> of like the KeenSerts, and install in the torque tube.  Once it's painted I
> don't think you'll be able to tell that anything ever happened to it!
>
> Al
>
> On Fri, May 3, 2019 at 3:19 AM Steve W. <swilliams268 at frontier.com> wrote:
>
>> Spencer Yost wrote:
>> > Helicoil as others suggested.   Metric bolts give you more options
>> > diameter wise, but a metric bolt on an antique canon would probably
>> > cause the universe to implode. (-;
>> >
>> > Sent from my iPhone
>> >
>> >
>> >
>> > Spencer Yost
>> > On May 1, 2019, at 12:00 PM, Stephen Offiler <soffiler at gmail.com
>> > <mailto:soffiler at gmail.com>> wrote:
>> >
>>
>> I would opt for a KeenSert myself. Those are a solid insert that keys
>> into place. A helicoil would likely work but the solid insert would be a
>> better option as far as sealing the exterior.
>>
>> --
>> Steve W.
>> _______________________________________________
>> AT mailing list
>> AT at lists.antique-tractor.com
>> http://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com
>>
> _______________________________________________
> AT mailing list
> AT at lists.antique-tractor.com
> http://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.antique-tractor.com/pipermail/at-antique-tractor.com/attachments/20190503/40d9e5a0/attachment.htm>