[TheForge] Re: engineering question

[Mike Linn]

I agree with Mike Spencer... in a perfect world Walter may be correct, but 
in practice its VERY difficult to get the on-square hole lined up properly. 
On-diamond I think is a little more forgiving. Ultimately its going to 
depend on the size of the stock,  a 1/2 inch hole through 2 inch stock aint 
gonna matter but 1/2 thru 1/2 it will..

mike

At 11:55 AM 10/3/2004, you wrote:


>Walter opined:
>
> > When you look at the forces as they flow trough the
> > object, the square would show less stress.
>
>And I would say just the opposite.  But that's guesswork.  I suspect I
>guess that because the first thing I ever made using the technique was
>1/2" sq. through 1/2" sq. and I found it was hard and frustrating
>trying to avoid making too-thin or stress-cracked weak spots in the
>eyes at the inside corners, e.g....
>
>              ....here:
>                   /
>                  /
>                 /
>       |      | /                   |    |
>      /  _____ \                   /  /\  \
>     /  |    |  \                 /  /  \  \
>     |  |    |   |               |  <    >  |
>     \  |____|  /                 \  \  /  /
>      \        /                   \  \/  /
>       |      |                     |    |
>
>
>Or more like....here:
>                  /
>                 /
>       |      | /
>      -+ _____+-
>     |  |    |  |
>     |  |    |  |
>     |  |____|  |
>      -+      +-
>       |      |
>
>where the '+' representiong the inside corner in the outer bar comes
>really close to the corner of the eye.  The diamond opening reduces
>the risk of that weakness because the eye is opened to a gentler angle
>at the problem point.
>
>
>In retrospect, 1/2" sq. may just have been too small a cross section
>for the technique combined with my skill level at the time.
>
>- Mike
>
>--
>Michael Spencer                  Nova Scotia, Canada       .~.
>                                                            /V\
>mspencer at tallships.ca                                     /( )\
>http://home.tallships.ca/mspencer/                        ^^-^^
>
>--
>
>
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            Mike Linn
      Artist Blacksmith
          McCalla, AL
        AFC Webmaster
http://afc.abana-chapter.com


"Don't worry Chief, I can stand the torture if they can stand the screaming."
                                              - Maxwell Smart, Secret Agent 86


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