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

[Stephen Offiler]

Oh, and with apologies for the continued critique Spencer, M15 x 1.0 would
be a very fine pitch, not coarse.   For comparison, M14 x 1.5 is the fine
pitch and M14 x 2.0 is the coarse pitch.

SO


On Sat, May 4, 2019 at 1:40 PM Stephen Offiler <soffiler at gmail.com> wrote:

> Spencer:  I still question the 15mm fastener.  I originally checked
> McMaster-Carr before I ever commented; now, I've double-checked there plus
> MSC and Grainger.  These are THE three "go-to" industrial suppliers
> online.  None carry 15mm fasteners.  They go straight from 14mm to 16mm.
>
> SO
>
> On Sat, May 4, 2019 at 10:47 AM Spencer Yost <spencer at rdfarms.com> wrote:
>
>> I’ve been giving this some more thought, and I am actually now a little
>> more serious about metric if you can tolerate the idea of a metric bolt on
>> a canon.. All you need are:
>>
>> 15 mm x 1 threads per millimeter tap.
>> 14 mm drill for initial boring prior to tapping.
>> A 15 mm x 1 threads per millimeter bolt at the length you need.
>>
>> No special tooling, no  excessive drilling diameters, etc.  A single
>> thread per mm is a course pitch so it meets that requirement.  This is all
>> fairly cheap, straightforward, available from major Internet retailers and
>> probably your local fastener store if you have such a beast. I am lucky - I
>> have three.
>>
>>
>> Anyway you go, best of luck.
>>
>> Spencer Yost
>>
>> > On May 4, 2019, at 9:58 AM, James Peck <jamesgpeck at hotmail.com> wrote:
>> >
>> > About 10 years ago I was on a flight to Kansas. I can't quite remember
>> the sequence of events. I heard large men speaking a language I do not
>> remember hearing before as I got on the flight. One ended up seated next to
>> me. Turned out they were from Dronningsborg and were going to Agco in
>> Hesston for a project meeting.
>> >
>> > I asked what they were doing about metric fasteners. The Dane said that
>> they had been all metric until Agco purchased them. They had been switched
>> to mixed metric and SAE.
>> >
>> > It may be irrelevant. Agco shut down Dronningsborg and bought into
>> Laverda. Are the combines made for Agco by Laverda all metric? Why would
>> they not be?
>> >
>> > https://en.wikipedia.org/wiki/Randers
>> >
>> > [Al Jones] 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!
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