As a mechanical engineer I'm going to throw this out there for comment....
The days of the farm grown engineer (with or without degree) are a thing of the past. We very rarely get any new engineers with any practical sense, and in my opinion engineering school are stressing the wrong things. Too much time is spent on computers including FEA and not enough time on how to make things; both physical manufacturing, ease of assembly/maintenance, and functionality.
It's possible that with that size nut and tension in the rod that is what the torque actually calculates to. Doubtful though.
But as stated above, I'd rather have it be a PITA to take off than have it come apart when I didn't want it to.
I'm going to post a poem I've got framed on my wall for your enjoyment since I think it pertains.
And remember, its more often the bean counters fault than the engineers....
The Successful Designer
The designer bent across his board wonderful things in his head were stored and he said as he rubbed his throbbing bean how can I make this hard to machine
If this part were only straight, I'm sure it would work first rate, But 'T would be so easy to turn and bore It would never make the machinist sore.
I'd better put in a right angle there Then I'll watch those babies tear their hair Now I'll put the holes that hold the cap Way down there where they're hard to tap
Now this piece wont work, I'll bet a buck, For it cant be held in a shoe or chuck; It cant be drilled or it cant be ground In fact this design is exceedingly sound.
He looked again and cried, "At last-- Success is mine, It can't even be cast"
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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