On Thursday, June 6, 2013 10:34:32 PM UTC-4, asdfasdf wrote:
When using a nut, lock washer and bolt, should you also use a flat

washer between the object and the lock washer? I have seen it done

a million times that way but it seems the flat washer defeats the

purpose of the lock washer. I assume the lock washer is there

to dig in a bit to the object and the nut to keep it from

loosening. The flat washer seems like it would allow the

lock washer to rotate without digging in to the object.



Anyone know?

Some simply consider split ring washers to be the work of the devil.

I found this looking for a more extensive set of videos of bolts loosening, and the test rig used.

http://www.boltscience.com/pages/jun...ringwasher.htm

http://www.boltscience.com/pages/hel...ingwashers.htm

http://www.boltscience.com/pages/vibloose.htm