Thanks for the reply longrat.
I certainly want to go with a replacement motor similar to yours. However I think I would like to repalce the bearings even if its just to help me sleep at night!.
Having not dismantled the head do you think this will be hard? Will I have trouble getting the bearings off the spindle? Am I really wasting my time (and cash) with the replacment idea and better just living with 3600rpm.
Have you connected the vfd to mach3? Will it allow for auto reverse (tapping etc?)?
I have managed to run my Wiess machine cutting delicate parts for about 5 hours, no problem. Yet this was only doing 2250RPM and yes the quill was very very hot!
A