Joe,

Thanks for your reply. I notice that you have added an electronics box and water cooling since your first posts. Very nice.

I was considering using a heli motor which has forced air cooling built in. The down side is that their shaft diameter limits the size of ER collets to ER11 (from memory) without rework. However,this is not too much of a problem for I don't need a heavy duty machine.

If I achieve the quality of finish with mine that you did with yours I will be very pleased.

Funnily enough I also found today the spindle you wish to replicate. It is impressive, but way beyond my skills or available time. Good luck and keep us posted.

Kind regards,

Kenneth