Quote:
Originally Posted by SeaSlugs
I have backed off some old nuts on model A parts before and the lock washers are either A flat or B crumble into bits undoing the nut.
Yes lock washers job is to prevent stuff from turning but heat cycles it does not prevent.
Ive put nuts in a vice and tighten them till i just barely see the nut squash. By the time you release it will spring most of the way back but it will be an interference fit .
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Boy, I sure know what you mean!
I have found that the harder the split lock washer (Grade 8 for example), the faster it looses its spring and easier it is to break.