On Saturday, March 15, 2014 12:52:22 PM UTC-4, wrote:

I'm building an engraving spindle using a high speed bldc motor made

for a model airplane. So the ER8 holder will be the spindle. Which means the

bearings will have a 10mm ID and a max OD of 30mm in order to fit into

the spindle housing which will fit into a 1.5 ID tool holder.

Eric


I am a retired electronic engineer so my advice is worth what you pay for it.