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265838 <ecoyle@t...> 2018‑05‑16 re how bigg is your biggest try square.....
The opening question suggested machinists squares were part of this query, and
while I’ve got wooden try squares up to about 12”, if we’re talking machinists
squares, my biggest has a tongue of 36” and it is so heavy that it takes two men
and a boy to lift, It has it’s own protective box, probably not original,
Similar to this, but made by browne and sharp
http://www.starrett.com/metrology/metrology-products
/precision-measuring-tools/squares/Solid-
Squares#currentPage=1&displayMode=grid&itemsPerPage=24&sortBy=wp/asc

It is so large that it can check rafter squares to ensure inside edges are
square with outside edges, and of course inside/outside  edge squareness. with a
high degree of precision, but when I want portability, I just use the 24” tongue
B&S smachinists square.

And now I can drill hang holes in them with my MF 666 devils drill (running and
ducking!)

There are ever so many reasons as to why a try square, or for that matter a
square of any type has been abused, that even if the stock looks pretty with
it’s wood and brass,  that it has to be tested to prove it’s squareness

Eric in cowtown
265841 Thomas Conroy 2018‑05‑16 Re: re how bigg is your biggest try square.....
I could swear that I've seen a photo, old-time work yard, with a man standing
next to his try square. It's taller than he is.
I can even see using one that size, maybe in shipbuilding.
But, since no-one has mentioned such a size, I suppose I must be misremembering
a similar tool, or maybe my mind is making it up wholesale.

Or maybe it was a tall-tale postcard photo, like the ones of cobs of Iowa corn
being carried in railroad log cars....
Tom Conroy
265842 Erik Levin 2018‑05‑16 Re: re how bigg is your biggest try square.....
Thomas Conroy wrote:


> I could swear that I've seen a photo, old-time work yard, with a man standing
> next to his try square. It's taller than he is.
> I can even see using one that size, maybe in shipbuilding.
Interesting. I would think a square that size wouldn't be for checking
squareness of a part, per se, but might be for alignment of parts. But, then
again, I see new things every day...




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