Forums > Technical Discussion > Locknuts

Posted: 25th Nov 2007
There are fully metal graded lock nuts available, these are the ones you need to be using if your considering using lock nuts with fire, the other option is to counter tighten two nuts together and score / distort the thread below.

mark

Posted: 25th Nov 2007
Harr - distortion - one way poi, but nice solution.

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Posted: 14th Dec 2007
Rellizate, I think he means scoring the thread so the nuts cant unscrew themselves. The other option would be thread lock - I'm sure you can get hi temp stuff that is used in cars - just spread it on the thread, tighten, and leave to set. it wont ruin the thread, and you'll still be able to unscrew it if you need to. Another possible solution would be two nuts, one with a reverse thread. so you tighten one nut, then the other nut screws on, but turns anticlockwise to tighten. they'll tighten against each other! Only problem is, they're pretty hard to come by....

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Posted: 15th Dec 2007
Not quite, you can't put nuts on the wrong way round anyways.

You can however just tighten a second nut against the back of the first for extra security.

Posted: 15th Dec 2007
LOL rellizate no, the way you put a nut on does not change the way the thread goes :P

There is no better way to teach yourself concentration than learning staff next to a topless female.

Posted: 16th Dec 2007
yeah, you can buy nuts that have a spring washer attached, but its easy enough to just buy some spring washers to go with the nuts you already have. It makes no difference whether you use the attached washers or seperate ones.

There is no better way to teach yourself concentration than learning staff next to a topless female.

Posted: 18th Dec 2007
Basically the two nuts together, or the spring washer, would cause the nut to lock into place by placing enough friction against the thread itself to overcome any chance of slipping off. I know its effective in just about any situation. The threading on the inside of the nut rubs so tightly against the threading of the bolt itself that the whole set is jammed tight. Without a tool and some force to overcome that friction, it doesn't move.

But its not something that is often put under high temperature tests. The only way to know for sure is to test it yourself. I would go for the spring washer over the double nut method because the washer is specifically designed for this kind of thing. The double nut method is simply an improvisation, and that still wont have the same tension that spring tension would.

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Posted: 19th Dec 2007
Alternatively, if the nut and bolt are big enough you can drill a hole right through the side of them, and lock them in place with a split pin.

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