I'm trying to verify the correct dimensions for a 160mm x 100mm EuroCard. I figured this would be simple: 160 millimeters by 100 millimeters. But when I submitted a template to the Kicad project at https://github.com/KiCad/kicad-library/pull/1441.


I was told that I need to trim the board back by .15mm, citing this document: https://www.elma.com/-/media/general-web-content-files/resources/pdfs/us-corporate-dimensions-of-pcbs-d.ashx?la=en&hash=13B1EAF4FF743087F8B7E87BB10A1D20C44C40BD

This doesn't seem to make sense to me. I always thought that the bearing surfaces on the card cage would be spaced slightly more than the card width. What's going on here? What am I missing?


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David Griffith
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