I think the best way to demonstrate this is to use a dual beam torque wrench that almost none of us process now. Thankfully my dad has one so I got to visually see how they work. There is probably a video on the click type with a teardown to see how it works. I'm guessing the electronic ones are just twisting against a load cell calibrated to show the results needed.
I think you have cause and effect muddled. The torque wrench click when the torque is delivered regardless of the movement of the shaft, but the elasticity of the shaft means that at the toque applied there will be a visible twist. If you applied a much smaller torque using a mircro torque wrench the movement would not be visible, although twist would be there and only visible using optical techniques. Eventually you can reduce the torque to the point where the torque induced movement is small compared to the natural movement of the shaft, at which point you are probably close to quantum effects.
You appear to be the only one who’s figured this out. He shouldn’t have increased the torque setting, he should have decreased it! He really doesn’t understand what’s actually happening. You are 100% correct.
@@redmille1000 are you a Matt fanboy then? He was saving people from themselves, but now is just taking the piss. I’m no fan of Delboy, but all Matt is doing now is getting views on the back of another RU-vidrs instead of making original content himself.
Surely you need another block sat just under the hex not welded to the shaft , either with a hole of a tolerance fit to the shaft or maybe a bearing and that block also needs clamping in the vice so the whole fixture is horizontal, the bar that the dial gauge measure’s off in the same place, it looked to me there that all you were doing was pulling the shaft towards you in the direction your applying the torque, because the shaft is 9” in the air, which is why when your torquing a head down say you always put the palm of your hand against the head of the torque wrench and push away from you as you pull towards you with your other hand, otherwise your not applying the twist in the same plane as the bolt your turning !! Surely !! Either that or simply clamp the half inch drive of your torque wrench in the vice itself, it will click , trust me !
Hmmm, would mounting the gauge onto the base of your test "bolt" not be a more accurate reference point for measuring deflection? Or maybe drill a couple holes in the base and bolt that MF to the floor
No he didn’t. He doesn’t even understand what is actually going on. This was the dumbest demonstration ever. He INCREASED the setting when he should have DECREASED it. See my comment above. He’s clearly wrong in all his assumptions.
@@G58 He does, he's just making fun of it. Watch (untill) the end. A bolt/nut does NOT have to move for a TW to "click", like Stuart claims. Even if you make a TW click like 100 times, you're not going to overtighten a bolt/nut. Unless you don't know what you're doing and put more force AFTER each click, or use a TW rated for 250 Nm to tighten a 19 Nm bolt/nut lol. But you know that, right ?
Its really a semantics thing... Saying "the torque wrench wont click unless the bolt moves" is preposterous. Put a 12 inch by 12 inch 36inch length of tungsten with a 2 inch bolt head machined into the top... Mount it to the core of the earth.... . Put the torque wrench on that and see if "it wont click" unless it moves. its just some ball busting because it just didnt need to be said. Like much of dilldudes yammering. Great video! And awesome shop...
You actually haven’t proved anything other than your lack of understanding of what’s really going on. The torque setting is a measure of resistance. It has nothing whatsoever to do with movement in the bolt. Once the specific torque setting is reached, the wrench will click. You shouldn’t have increased the torque setting, you should have decreased it! The principle is very simple. The torque wrench is a lever with an adjustable detent. If the torque wrench is set to a high setting, the bolt will be turned according to the amount of leverage over the bolt - until it reaches the set limit. If the torque wrench is set to a low setting, the bolt will be turned according to the amount of leverage over the bolt - until it reaches the set limit. It’s just the law of levers. It’s got nothing whatsoever to do with the bolt turning. The fact that Matt praised you may be because he’s primarily a theorist.
I don't understand the logic behind this experiment . All you are doing is showing that if you apply sufficient force to a shaft , then it will eventually twist the metal in the direction of the leverage. Whether a torque wrench will click before the shaft twists is entirely dependant on how high you set the torque wrench value. You could have saved a lot of effort by simply clamping the torque wrench in a bench vice . In a low torque setting the wrench will simply click when it reaches the torque setting whilst nothing else moves , conversely , on a high torque setting the the vice and workbench itself might spin before you ever reach a ''Click''. !
It's a piss take, you need to watch Matt's video where he asks viewers to send him some videos on the subject. Yes, it's a lot of mucking around but it was fun doing it.
