JRT
NES Member
He never died you know....it was a government conspiracy
I wish that were true, one of a kind.
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He never died you know....it was a government conspiracy
that'll work
Actually, it was done in post 4 and 11. You could've gone away a long time ago.So glad we all know the difference between clips and Mags now! It only took 38 posts.
Oh, what GlockJock said, he is the expert!
I'll just drop this here now and go away.
Don't worry about the clip/mag reference OP. We all have to start somewhere. The peeps here wouldn't rib you if they didn't care.
As far as the 30cal/clip/mag goes, let's let Jerry give us the heads up!
Enjoy!
StevensMarksman
Spring steels are normally formed at a harness that is close to the ulitimate hardness that can be achieved for that particular alloy, however they are NOT at the full hardness that can be achieved. Because of this it's completely normal for a compression spring to become slightly shorter when it's first cycled. This is where the term of a spring taking a "set" comes from. What happens is that as the spring is cycled it will increase in hardness slightly to it's ultimate hardness and because it's a compression spring, it will reduce it's length slightly as this happens. Once that fully work hardened state is achieved that "set" won't change until the spring approaches failure due to internal crack migration due to fatigue. Basically the process is as follows, initially a slight loss in length with a slight increas in compression strength, followed by a long period of stable length, then followed by a rapid decrease in free length leading up to complete failure. Note, this only happens as a result of cycling of the spring through compression/decompression cycles. Keep a compression spring compressed and it won't ever fail until it starts to corrode.
Hooke's law states thator, equivalently,
whereis a positive real number, characteristic of the spring. Moreover, the same formula holds when the spring is compressed, withandboth negative in that case. According to this formula, the graph of the applied forceas a function of the displacementwill be a straight line passing through the origin, whose slopw is.
Hooke's law for a spring is often stated under the convention thatis the restoring (reaction) force exerted by the spring on whatever is pulling its free end. In that case the equation becomes
since the direction of the restoring force is opposite to that of the displacement.
Yup. Hooke's Law. Net force on the spring is zero, so no displacement or wear of the spring (unless temperature or chemical contact changes the spring constant).
In plain English...
and every now and again.....View attachment 131890
I'm sorry but you're wrong. The net force on the spring is not zero if there is a constant force compressing it.Yup. Hooke's Law. Net force on the spring is zero, so no displacement or wear of the spring (unless temperature or chemical contact changes the spring constant).
Did you even read these links?I'm sorry but you're wrong. The net force on the spring is not zero if there is a constant force compressing it.
http://www.mubea.com/products-techn...ard-disc-springs/theory/relaxation-and-creep/
http://www.rockfordspring.com/relaxationofsprings.asp
http://www.lesjoforsab.com/technical-information/durability.asp
those are just the top three hits when you Google "spring relaxation"
1 or 2%? If that percentage is correct and not just margine of error, buy +5% springs for your mags and no problem. But then it presents data for spring wear at high temps, which isn't what we're talking about.This relaxation is usually less than 1 or 2% at room temperature, but can be much more when the spring is exposed to higher stresses or higher temperatures.
I really don't want to argue with you because I have much better things to do. I work with a ton of springs on a daily basis at work and have seen spring relaxation first hand. If you don't want to believe spring relaxation and creep are real then all the power to you.Did you even read these links?
First link... all data is for disc springs, not coil.
Second link says... 1 or 2%? If that percentage is correct and not just margine of error, buy +5% springs for your mags and no problem. But then it presents data for spring wear at high temps, which isn't what we're talking about.
Third link says throughout when the spring is in the act of returning to a decompressed state is when the most damage is done.
So let me explain what Net Zero Force is since you didn't read what you linked. Spring pushes in one direction with force X. Bullets, which are held in place, push back with equal and opposite force -X. Add those two together X + (-X) and you get 0. No net force means no displacement means no wear on the spring.
Sorry. I'm a scientist, so claims without numbers to back them up won't sell me on them. Google some more. Please.
Hey, me too. I'm clicking a retractable pen while I type this. Have a great day.I'm not going to argue with you because I have much better things to do. I work with a ton of springs on a daily basis at work and have seen spring relaxation first hand. If you don't want to believe spring relaxation and creep are real then all the power to you.
quoted from the second link:
"A spring held at a certain stress will actually relax more in a given time than a spring cycled between that stress and a lower stress. The reason is that it spends more time at the high stress."
This is a misuse:
View attachment 132428
Obviously it would not work in real life because of the different calibers...
Is that thing mass compliant?