Torque Talk

Brief discussion on the dangers of over-tightening fasteners. Shows use of Craftsman click-type torque wrenches in both lb.ft. and lb.in. Transcript provided for the hearing impaired: [Music] The service manual calls for fifty three inch pounds. OK now I'm going to show you here on this wheel nut that you can easily put fifty three foot pounds on it with just one hand. Now a foot pound is obviously twelve inch pounds so it's twelve times the power we're going to require on these little nuts over here. OK I've dialled in fifty three foot pounds. I just wanted to show you how easy it is to make that kind of power never mind the fifty three inch pounds, which is all you need on the studs to hang our side view mirror. So I' just going to make some power. Let's just say like that. You see I was only a foot out rather than the actual full eighteen inches. Just do that real quick and prove... you see that? I don't turn at all and it's already saying fifty three foot pounds. So I was able to make fifty three foot pounds with just one hand and only twelve inches of leverage. So we take it up to there's forty inch pounds and a zero we want to go to fifty-three so I don't know if you can see this very well but there's fifty eleven twelve thirteen. Forty and thirteen is fifty three. Alright I'm going to just torque these down nice and even you want to you want to bring all the bolts snug before you try and apply the torque. I can feel, I've developed a feel for it so I sort of know when the spring inside is about to jump. That's the first one. I don't know if you noticed it. There's the second one. There's all three. I'm letting go with this hand in order that it doesn't interfere with the torque I'm applying with this hand and you see I'm doing it with just two fingers of pressure. And that's what I am trying to impress upon you in this episode is that some things can't take a lot of power and you can make a lot of power no matter how small you think you are no matter how weak you might believe you are you're very strong compared to small fasteners and it's very easy to break them.

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2010/10/22 Repairs101   Share on Facebook

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