LowPowerLab Forum

Hardware support => General topics => Topic started by: TD22057 on December 23, 2016, 11:27:53 AM

Title: Question about SwitchMote threading in plated holes
Post by: TD22057 on December 23, 2016, 11:27:53 AM
I'm designing a PCB for a small home project where I need a threaded mounting hole in a PCB (light weight - no real load on it).  My nominal plan was to have the board house drill a small pilot hole and then I'll drill that out to fit a press fit, threaded nut (something like this (https://www.mcmaster.com/#95117a433/=15lfdba)).

But I noticed that the (very cool) SwitchMote has a threaded, plated hole for mounting the cover plate to it and was wondering how that was done.  Is it a standard plated through hole which is tapped?  Or are the threads cut just by putting the screw into it? 

Thanks,
TD
Title: Re: Question about SwitchMote threading in plated holes
Post by: perky on December 23, 2016, 12:41:53 PM
I'm not sure there are tapped, it looks like the spacer itself is tapped and the two PCBs are held together by fitting a screw in both ends, but I could be wrong.
Mark.
Title: Re: Question about SwitchMote threading in plated holes
Post by: TD22057 on December 23, 2016, 12:46:59 PM
Sorry - not the PCB mounting holes.  I'm talking about the outer 2 holes in the LED PCB that is used to secure the plastic light switch cover plate.  This one: (http://farm6.staticflickr.com/5529/12449814683_fbb7971edb_o.jpg)
Title: Re: Question about SwitchMote threading in plated holes
Post by: sparky on December 23, 2016, 01:09:04 PM
According to this picture you make the threads yourself.
Title: Re: Question about SwitchMote threading in plated holes
Post by: Felix on December 23, 2016, 01:15:32 PM
Yep the first time you screw it it, it threads the plated hole. The only thing to mind is keeping it fairly perpendicular, the hole itself helps pilot the screw in somewhat.
Title: Re: Question about SwitchMote threading in plated holes
Post by: TD22057 on December 23, 2016, 01:18:35 PM
Quote from: Felix on December 23, 2016, 01:15:32 PM
Yep the first time you screw it it, it threads the plated hole. The only thing to mind is keeping it fairly perpendicular, the hole itself helps pilot the screw in somewhat.

Thanks for the confirmation.