Perfect the First Time?

The I.R.S.!!! They have managed to screw each and everyone of us and have been doing so generation after generation right out of the gate...

Quote:

---

Originally Posted by Sharp shooter

You belong in this boat man! lol

https://scontent-b-pao.xx.fbcdn.net/...40608281_n.jpg

---

That would be one sweet deal, I'd drink an 18 pack of original to run that deal up the river.

I'm going to nominate the Colt SAA, .45 caliber


CH3NO2

Quote:

---

Originally Posted by Stainless

I'm going to nominate the Colt SAA, .45 caliber


CH3NO2

---

Same for the Colt .45 auto pistol


CH3NO2

The Colt 1911 has a flaw. The trigger lock safety could be better placed.

this is probably the best example I know of.
Thread root diameter and angle of the thread cut(not the pitch) hasn't changed in 150 plus years. All threads, whether metric, Whitworth, or SAE, course and fine, all follow the same basic engineering that was layout almost 2 centuries ago, and it hasn't been improved upon. Methods to from threads have improved, but the geometry has remained the same.
Even the thread pitch(threads per inch) is very similar throughout the world. They may call it threads per millimeter, but the count is extremely close. You can duplicate most metric threads on a American made lath using preset thread settings.
Westernearo may be able clarify that. But this has remain unchanged pretty much since the day one.


A nut from the civil war will thread on a bolt made today.

http://us.123rf.com/400wm/400/400/wi...m-the-side.jpg

Everything is pretty much all about the nuts and bolts.

Quote:

---

Originally Posted by gn7

The Colt 1911 has a flaw. The trigger lock safety could be better placed.

this is probably the best example I know of.
Thread root diameter and angle of the thread cut(not the pitch) hasn't changed in 150 plus years. All threads, whether metric, Whitworth, or SAE, course and fine, all follow the same basic engineering that was layout almost 2 centuries ago, and it hasn't been improved upon. Methods to from threads have improved, but the geometry has remained the same.
Even the thread pitch(threads per inch) is very similar throughout the world. They may call it threads per millimeter, but the count is extremely close. You can duplicate most metric threads on a American made lath using preset thread settings.
Westernearo may be able clarify that. But this has remain unchanged pretty much since the day one.


A nut from the civil war will thread on a bolt made today.

http://us.123rf.com/400wm/400/400/wi...m-the-side.jpg

---

Nice job Bob. The only thing I would change about what you said is metric threads aren't designated by threads per millimeter per say. Metric thread pitch is a crest to crest measurement. So a 13mm x 2.0 means the threads are spaced 2.0mm apart. Multiply 2.0 by .03937 is .0787", so your feed rate on a lathe would be .0787.

Quote:

---

Originally Posted by WESTERNAERO

Nice job Bob. The only thing I would change about what you said is metric threads aren't designated by threads per millimeter per say. Metric thread pitch is a crest to crest measurement. So a 13mm x 2.0 means the threads are spaced 2.0mm apart. Multiply .75 by .03937 is .0787", so your feed rate on a lathe would be .0787.

---

How about 2.0 mm divided by 25.4 = .07874 or 25.4 X .07874 = 2mm.


Math Question: What is the square root of "69"??? Eight (Ate) Something... 8.3066

Quote:

---

Originally Posted by nowski

How about 2.0 mm divided by 25.4 = .07874 or 25.4 X .07874 = 2mm.


Math Question: What is the square root of "69"??? Eight (Ate) Something... 8.3066

---

Yep, same thing. Some use divide by 25.4 and some use multiply by .03937.
Fixed my earlier post. For some reason I put .75 x .03937, was supposed to be 2.0. :oops:

Skilsaw -77 (especially if you're right handed lol)