Author Topic: Self locking washers  (Read 1338 times)

Offline a10gf

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Self locking washers
« on: 03.08. 2009 21:12 »
Here is a clever device, at my work in oil exploration and naval related equipment manufacturing, some time ago these washers became mandatory to meet production and safety regulations.

After having used them for a while I understand why, any bolt or nut they are used on will, simply said, never fall off after a correct torque tightening. As bolt or nut may try to unscrew itself, the surfaces will move against each other and expand in a way to lock everything even tighter and stop the process.

Of course, they allow unscrewing at any time by an operator and will 'click' off at a certain torque. They are use-once and replace.

Quite amazingly effective. Something to think about for special applications. 8mm bolt on the pictures (btw, a used washer, showing wear and rounding of locking surfaces after bolt being unscrewed).


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Offline rocket man

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Re: Self locking washers
« Reply #1 on: 03.08. 2009 22:44 »
great idea if your bike vibes a lot  *smile*

Online bsa-bill

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Re: Self locking washers
« Reply #2 on: 04.08. 2009 08:42 »
Looks good, but where would you get them?

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Offline a10gf

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Re: Self locking washers
« Reply #3 on: 04.08. 2009 08:52 »
We get them from Wurth, I suppose they have them in all countries. Here they are called Nor-lock.

https://eshop.wuerth.de/Product-categories/Wedge-lock-washer/140135160301.cyid/1401.cgid
http://www.wurth.co.uk

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