[sdiy] Parts going out of module panel

[Andre Majorel]

On 2018-05-09 05:46 +0000, Matthias Herrmann wrote:

> To my knowledge the ???oval holes??? are actually meant to be
> double-D holes. They where originally used in the Eurocard
> rack-cases to take plastic or metal screw holders which would
> snap into them. If so they would have nothing to do with
> non-standard panel widths or different modular standards. The
> distance of the mounting holes is clearly defined, the
> tolerances of panel widths just depend on the manufacturers
> capability.
> 
> here is an example of such a screw holder:
> https://cdn-reichelt.de/bilder/web/xxl_ws/C700/BGTISH19.png

Sounds like you're right. According to [1], the shape of the
holes is the intersection of a disc 5.9 mm in diameter with a
horizontal band 3.3 mm tall.

    _______
   /       \  ^
  |         | | 3.3
   \_______/  v

  <--------->
      5.9

For my own use, I never bothered with that and just made round
holes, large enough for the usual M2.5 screws plus slop.

[1] https://schroff.nvent.com/wcsstore/ExtendedSitesCatalogAssetStore/Attachment/SchroffAttachments/Documents/7_1_Frontplatten_e.pdf

-- 
André Majorel http://www.teaser.fr/~amajorel/