- Joined
- Jan 6, 2017
- Messages
- 1,214
You should really do this on the mill. Make a block for your boring bar. Put it in the vise straight up and have at it. You can set your depth with the quill lock.
Just an idea.
This would be my first advice as well, with 1 caveat.
If it has junk bearings, milling it in place will permanently machine those junk bearings runout into the spindle. After that happens, you'll never have an accurate spindle again, regardless of how much you spend on bearings.
He can't put good angular contact bearings on that spindle, because it lacks the preload threads.
My opinion: experiment all you want with repairing this spindle, because in the end, you almost certainly be replacing it anyway.