3,4,5 and multiples thereof! It's your money, spend it like you want to!

quote:

Originally posted by trebor44:
3,4,5 and multiples thereof!

Not certain what that means...

quote:

Originally posted by trebor44:
It's your money, spend it like you want to!

Oh, I will. (Subject to agreement from the Family CFO, anyway...) Turns out I may be able to save the GT. Got a part on the way from Amazon that I think may fit. $9.

quote:

Originally posted by ensigmatic:

quote:

Originally posted by trebor44:
3,4,5 and multiples thereof!

Not certain what that means...

A triangle (corner) with marks at 3 and 4 units from the corner, and a hypotenuse of 5 units is a right triangle, or square. Another way to check "squareness" of a larger structure (say a wall framed on the floor before raising it), is to measure the diagonals. Equal diagonals = square. Much more accurate on larger items that any framing square in one corner.
 
I take most Amazon reviews with a grain of salt. I own several PEC tools and find them impeccable. I also own Starrett tools, and find little, if any, difference in accuracy, but a nicer finish over all on Starrett.

quote:

Originally posted by rbert0005:
Those are NOT rulers. Rulers are made from wood or plastic.

Those are scales.

Bob

They're not "rulers", either. "Rulers" are potentates, humans. Devices for measuring length are "rules".

flashguy

Is it a Model #812?

quote:

Originally posted by OKCGene:
Is it a Model #812?

Indeed it is.

There’s one for sale on eBay.

If nothing else works, it might be a parts scavenger.

quote:

Originally posted by OKCGene:
There’s one for sale on eBay.

If nothing else works, it might be a parts scavenger.

Ok, thanks.

The part I believe will work should be here tomorrow. If it doesn't work I may snag that. It turns out I can also buy the exact replacement part trom a couple on-line parts places for about $10.

ETA: My Lord! That is one seriously abused combination square!

Yep, that’s why I said a parts scavenger. I should have written parts donor. If all else fails.

You could save the search on eBay, you’ll get an email every day that another is listed.

If nothing else works out.

Good luck to you.

My Harbor Freight combination square isn’t very precise, but neither is my woodworking. I guess it really depends on what you are doing with it.

quote:

Originally posted by henryaz:
Another way to check "squareness" of a larger structure (say a wall framed on the floor before raising it), is to measure the diagonals. Equal diagonals = square. Much more accurate on larger items that any framing square in one corner.

I used to help the kids on a grounds crew at a baseball league in my 20s while I was getting my degree in engineering. It was a Chicago city park where bases were hammered in each game. Nobody knew about diagonals. So the bases were probably the reasonably correct distance between each other but they wound up with rhombuses. The throw from home to second was different than from first to third. When I laid out bases, the diagonals were perfect. I used to have the diagonals memorized for 40', 60', 80', & 90' diamonds. Good times.

quote:

Originally posted by ensigmatic:

quote:

Originally posted by trebor44:
3,4,5 and multiples thereof!

Not certain what that means...

Pythagoras' theorem:

The sum of the squares of a right triangle equal the square of the hypotenuse of that right triangle.

Or, A^2 + B^2 = C^2

A 3,4,5 triangle is the simplest right triangle to work with. Doing the substitutions where A=3, B=4, C=5 into Pythagoras' theorem gives 3^2 + 4^2 = 5^2 which simplifies to 9 + 16 = 25 and further simplifies to 25 = 25, thus a triangle that with sides that measure 3 and 4 with a hypotenuse of 5 is a right triangle. You can use this in carpentry to mark square lines with just a tape measure and pencil.

quote:

Originally posted by trapper189:

quote:

Originally posted by ensigmatic:

quote:

Originally posted by trebor44:
3,4,5 and multiples thereof!

Not certain what that means...

Pythagoras' theorem:

The sum of the squares of a right triangle equal the square of the hypotenuse of that right triangle.

...
You can use this in carpentry to mark square lines with just a tape measure and pencil.

Ah. Got it.

In other news: Amazon's package delivery strikes again. Part was scheduled to arrive today. Instead I get a delivery update: "Your package is still on the way, but it's running late. Now expected August 19 - August 20 — most packages arrive in a day."

"Most?" I guess if, by "most" you mean "more than half": Yeah.

I seem to get that a lot, from Amazon. Few on-time deliveries of products, some as late as...four months.

Conversely, I ordered a P320 pistol frame that came USPS a few days ago: it arrived a day early with email alerts at every turn, including a delivery message.

While you repair/rebuild what you have, keep your eyes open at auctions, yard sales and fleabay. I have several Starrett quality squares and have never paid retail. Something a little rusty will go for $5 at a yard sale. It’s good to have duplicates of important tools. One, a good square acquired this way, went to a cousin who was just starting his workshop. Spread the wealth and encourage self sufficiency.

Like you, I work to a very close tolerance when I can. IE - machinist tools for woodworking. I use a dial caliper all the time in my workshop. Want to know for sure what a drill bit size is? Dial caliper will tell me. Perfect fit dowel to a hole? Dial caliper will get me the closest drill size.

Why? I have worked, and can work, to .0005” tolerance in metal. Sometimes it is called for. This can be hard to do unless you practice. So, with less important things I practice. Then, when needed, I can do the job. This also results in projects often coming out better than planned.

quote:

Originally posted by r0gue:
You know you won't be happy until you appropriately replace the broken tool. It has nothing to do with need at this point. You must put right, that which hath gone awry. Get the $130 Starrett (one time expense) and live long knowing your square is better than mine!

........................................................
^^^^^^^^^
This, get the starrett.

Back to your original question, is it necessary to spend that kind of money on a square.
No more necessary than buying a $500-$1000+ Sig to reliably and accurately shoot ammunition. There are a number of guns that can be had in the few hundred dollar range that will do that.
Pride of ownership, or whatever, is the real question and what's it worth to each.

Update

Got the part from Amazon. Fit my square to a "T". Problem solved for $9.

All is again right with the universe