- Joined
- Dec 25, 2011
- Messages
- 10,552
That's probably too loose unless the spindle and gears are warm. The Atlas Technical Bulletin on the 6" headstock for the most part applies to the mill as well. The spindle and back gears are either the same or close to it. As Downloads is Down for the foreseeable future, I just attached a PDF of it. It says that with the belt slack and the bearings at the proper preload, there should be a slight drag as you rotate the spindle by hand, However, it is notable that all of the headstock bulletins are written as though the bearing cones were a push fit on the spindle. Which seems never to be the case. So approach the zero end float point slowly. And use a dial indicator on the spindle nose end to check for zero.