Hello

Thank you for reading my question

I do not have any experience in drilling 0.2mm holes on aluminium

I am not sure exactly what sort of aluminium it is, and I am not sure even about the type of the drill but I think it should be carbide
But what really surprised me they machine these Ø0.2mm holes mounting the drill on a collet

Collets sometimes can run up to 50microns out or less, it depends on the quality of the brand of the collet, and if you mount the drill in such collet I am sure the drill will break

I would like to hear some experience of machinist who drilled this kind of holes before, and what sort of holder did you use and what sort of run-out, if you checked the run-out if of course

Thank you in advance for your support