I am trying to understand why the holes on my board look sooo much bigger than the holes I see in my Gerber files. how can I make sure that the diameter is large enough or small enough to fit my componets? Is there some rule or trick to this?
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skriim wrote:...some manufacturers think that only fools follow standards; they claim that the diameter you set to be the one for a plated hole. This is a possible reason of getting bigger holes than supposed.The only manufacturer I'm aware of that follows what you've said is Olimex. All other places I've used specify the FINISHED hole diameter.
leon_heller wrote:... Samtec has this table for their connectors:Thanks Leon, that's useful. However, the actual clearances in that table are 6 mil for circular, and about the same for the square & rectangular section connectors. This is about what I try to use, and agree that 10 mil is a bit too big.
http://www.samtec.com/standard_products ... sizes.aspx
10 mil is roughly in the middle of the table.
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