/diy/ - Do It Yourself

I'm looking to make a centrifuge using this 3D printed rotor https://thingiverse-rerender-new.s3.amazonaws.com/renders/9c/5b/4b/aa/81/Dremelfuge_Chuck_Edition_V4_preview_featured.jpg or similar, but that spins a little faster. G-forces on the sample are proportional to rpm^2, so a little extra speed would really help.

Question is, what tool goes faster? I have a 30k rpm Black and Decker rotary tool, basically a dremel, but I'm seeing air die grinders and pencil grinders that go 60k rpm, like this https://www.intlairtool.com/chicago-pneumatic-cp9104q-pencil-grinder-1-8-collet-60-000-rpm-05-hp/.. This would give 4 times the g-forces as a standard dremel.

But I know nothing about air tools. Would the pencil grinder be able to spin a sample of this size(8cm diameter plastic rotor with a few mL of water in the tubes)? Would the spindle bearing shit itself at the slightest imbalance? Can I run an air tool at way less than full speed if I want? Is the air from such a tool directed forwards? If so, it would probably knock the rotor out of true.

Is there a class of tools that I'm not thinking about that would be better(faster) than a dremel for this task?

Thanks