Derek, the effectiveness of a spring washers fully depends on its quality. A
good spring washers is made out of spring steel, and the ends should show a
sharp 'curl' upwards. With a good quality spring washer you can cut your
skin. Unfortunately most of the usual spring washers only have ends cut at
an angle and slightly offset ends - when you flatten them by tightening the
nut they are as non-effective as a flat washer.
Jack Aeckerlin, The Netherlands
2011/6/22 Derek Job <derek.c.job@gmail.com>
> All,
>
> Yesterday must have been a slow day as I found myself googling 'spring
> washers' in the interests of increasing my limited knowledge of all things
> mechanical.
>
> One of the results was the artilce below, with video tests, which concludes
> that under various circumstances,spring washers, as well as not preventing
> screw loosening, can actually make it worse.
>
> Interesting stuff. What is the view of the list experts out there?
>
> http://www.boltscience.com/pages/helicalspringwashers.htm
>
> cheers
>
> Derek
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