I have a Charter Oaks Automation Square Column mill with the factory 3-phase motor and VFD controller. Which works quite nicely, by the way.
I have a symptom where the spindle runs with very little, almost zero, runout when I dial indicate the R8 taper inside, running with no load. However, when I cut, the entire thing wobbles. I've tried numerous collets and bits... so that isn't the cause. I'm assuming the load of cutting is causing the bearings to show slop where running a bare spindle (with the head sideways 90 deg to make reaching everything easier) does not.
So...
Can anyone point me to a post, guide, or documentation on how to change the bearings? And perhaps what bearings to order? I have searched, but I have not found... :-)
Thanks!