Making those risers above I was seriously unimpressed with the surface I was making It was just a used highspeed end mill. So I started looking at indexable carbide end mills that's a worm hole in itself. Anywho I started thinking I better see how true the spindle is running before trying to decide "how good,$$" the tooling needs to be.
Crap. Sat and thought about it for a few days.
You can see in the video the wobble isn't directly related to revolutions, so after reading a bunch of how to rebuild a spindle posts, I found that is a sign there's prolly issues in the bearings rather than a bent spindle The bad news is spindle bearings are
really pricey. So I tore in today.
Things went pretty well.
The Hoyer lift was handy
One time use tools, a pin wrench. Took a while to beat that big collar loose of it's threaded hole.
Grease was
nasty.
Lot of cleaning later and the bearing seemed good. Some one had been in it once, long ago, they left marks. carefully stoned and removed any ridges etc.
put it back together with light grease. Was hoping for a bit less runout, but not a new machine.
Whoop. whoop! that's a .0005" indicator....
I also worked on the R8 taper and upper bore with round stones and fine paper, cleaned up some old boo boos.
Just cheap chinese collets but...
Have a little project so brought in the rotary table, will figure out set up and drill a bolt circle in an aluminum disk.
Now I gotta decide on some tooling. Would like to make some more risers.