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Old 01-09-2013, 04:20 PM
Lew Hartswick Lew Hartswick is offline
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Default Power handsaw straightedge
Since I took these pix for the thread on Home Shop Machinist, (and since there
seems to be some "problem" for a few here to look at that site), thought I'd
put them up here too. BUT if the response is like that for the tramming aid
it may well be the last I do here.
The Unistrut is P 3300.
...lew...
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Old 01-09-2013, 04:23 PM
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Walker Walker is offline
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Nice!
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Old 01-09-2013, 04:24 PM
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very nice, I need a set of those.
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Old 01-09-2013, 06:21 PM
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Crap!!! I just scrapped some unistrut a couple of months ago. Should have kept a few for this use.
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Old 01-09-2013, 06:25 PM
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Thats funny I just drug in a piece of that the other day to do the same thing but was afraid that it wasn't strong enough. How does it work
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Old 01-09-2013, 06:33 PM
Roddo Roddo is offline
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Nice. I understand the second model is sufficient but the prototype looks professional.
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Old 01-10-2013, 08:40 AM
Lew Hartswick Lew Hartswick is offline
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Quote:
Originally Posted by digr View Post
Thats funny I just drug in a piece of that the other day to do the same thing but was afraid that it wasn't strong enough. How does it work
Well I built those about 17 years ago, while still at UNM and been using them
ever since. I did a calculation on the deflection (sidewise) for an 8 ft span
and for the smallest stuff ( P 4100 ) it was 0.006 inch per pound. I use P 3300
for real use. I don't see the number for that in my pile of paper.
If anyone wants to calculate it:

Deflection(in.) = force x length cubed divided by 48 x E (for steel 3 E7 ) x I ( for the particular model of Unistrut in the lateral direction)
...lew...
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Old 01-11-2013, 04:55 AM
pineyfolks pineyfolks is offline
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I like it , I might make a short one to use on my drillpress and bandsaw
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Old 01-11-2013, 09:50 AM
Lew Hartswick Lew Hartswick is offline
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Unistrut is one of those things that can be used for lots of things. I made a
guide (whatever you call the thing that the fence slides along) for my bandsaw
(wood working) and even a "sort of" copy of the Unisaw fence mechanism using
it. Plus all sorts of other "stuff" ove the years. Oh! and a "T" slot for a router
table using the minature stuff. (forget the number of that)
I can't imagine NOT having that around.
...lew...
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Old 01-12-2013, 02:42 AM
Index Manager Index Manager is offline
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I like it. I added it to the project Index under Shopmade Tools/ Vises and Clamps.
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