@mactech54
I will use the spindle in my router so there will be almost no load.

Quote Originally Posted by Mecanix View Post
ps. oh and did I forgot to add you need an oil coolant for that kind of speed. My bad, that's right... I have this ugly oil chiller sitting right next my machine just for that spindle. Can't get rid of it because I occasionally machine with 1mm end mills and that needs the whole 16k-18k in most cases. So... think about that too
Is the oil coolant just for cooling down the housing or does it flow right trough the bearings so cooling and lubrication is achieved together? Sorry I'm lost at that point.

oh, and yes, I don't have a dynamic balancing equipment. I wanted to build one but I never get into it.