boji

Vulcanized Fiber vs plastic washer
« on: June 10, 2019, 01:29:29 AM »
My intuition says pressed fiber would remain insinuative longer, and keep screw tension longer than cheap amazon plastic washers. What's your opinion?  Some third option like HDPE?


Gold

Re: Vulcanized Fiber vs plastic washer
« Reply #1 on: June 10, 2019, 11:55:44 AM »
When I want a screw isolated from chassis I use nylon shoulder washers and regular nylon washers. Once it’s isolated from the chassis I use stainless steel lock washers on top of the nylon to keep everything in place. If it’s a brass binding post I usually use a brass nut and solder it onto the post.

boji

Re: Vulcanized Fiber vs plastic washer
« Reply #2 on: June 10, 2019, 07:05:03 PM »
Thanks, Gold.   You gotta be pretty confident in your pcb to be soldering the standoff nuts!  I might do that just to try. 
Does threadlock degrade too?  Not sure why I care about these silly pcbs being secure 50+ years from now...

Gold

Re: Vulcanized Fiber vs plastic washer
« Reply #3 on: June 10, 2019, 08:29:27 PM »
I don't solder the standoff nuts. I was talking about having a binding post for audio common isolated from chassis. For standoffs I use thread locker on both the chassis side and the PCB side. I don't use toothed lock washers on the PCB because they can puncture the PCB and cause shorts. I know from experience...You could use them on the chassis side but I like the outside of a case to be a smooth as possible.


 

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