Drilling Ø0.2mm holes on aluminium

[magicniner]

I am a complete novice but cannot see how else you would do this as most chucks are not going to hold 0.2mm accurately enough.

At the required speeds much of the available equipment has adequate provision for accurate tool holding, I've drilled 0.3mm holes in 316L with carbide drills, I used the supplied chuck on ajapanese X7 speed increaser, peck drilling at 28800rpm with WD40 for lubrication.
You're more likely to break small drills by running them too slow than anything else.

[Boyan Silyavski]

Aluminum is a bitch for such small holes. Of course you need a collet, not chuck. Even cheap chinese collet holds 0.01mm or better. And to tell you the truth when speaking about precision, you are most likely to loose precision from not cleaning properly your spindle or collet, than from the collet or spindle itself.
You definitely have to peck drill and make sure you blow away the chips. Chips no dust or rubbing.
Drills must be carbide and brand ones. Look at Kyocera on ebay, drillman1

[hoezap]

Thank you very much indeed to everyone