End mills / Drill bits for aluminium

[JAZZCNC]

No they won't drill paper at 1000rpm and 5000Rpm is about the lowest usable speed and even then they don't drill very well.

I'm cutting and drilling Ali all the time with same spindle and Drilling aluminium with these spindles needs a few things in place, air and mist coolant then use Peck drilling. If you have these you can just about drill 8mm but I very rarely do and prefer to pilot with 5 or 6mm drill then use drill press.
Also with lots of larger holes like 20mm then I'd not bother with drill and just use pocketing and spiral down with 8-10mm end mill and open out to diameter.

So small holes drill and large holes Pocket and in all cases if doing lots of them you'll need coolant to extend tool life and stop small drills sticking and clogging.
Really only time I drill holes is when the drill size is hole size required and any hole larger than 8mm I use pocketing.