[TowerTalk] Lockwasher comparrison

[jimlux]

On 7/24/16 8:11 PM, Roger (K8RI) on TT wrote:
> This video shows the comparison between various ways of locking nuts.
> The reaction to a lock washer and vibration was a real surprine. Only
> one method actually worked.
>
> https://www.facebook.com/Trustmeiamamechanicalengineer/videos/746827738792165/
>
>

Well, there's also using a threadlocking adhesive (Loctite) and safety 
wire...

Lockwashers are widely acknowledged to be worthless in actually locking. 
  What's important is having enough bolt stretch (which in turn is 
dependent on good lubrication of the threads if you're measuring 
torque).  If you have enough bolt stretch, the load on the "inclined 
plane" of the threads is sufficient to prevent the nut from vibrating off.

temperature cycling makes it tougher,of course.