How to determine the drill bit size?

[rach black]

If I need to drill a certain hole in a particular metal alloy. A hole’s diameter and tolerance are used to illustrate its cylindricity and/or the perpendicularity of its axis relative to some reference datum. I’m wondering whether there are any suggestions for choosing the suitable size/geometry of the drill bit or the sequence of operations to get the desired hole.

[max green]

You can find the drill bit size chart on lots of sites such as IPQC’s WIKI, standard size drill bits available in several measurement systems.

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