Originally Posted by
NC Cams
Spindle bearing replacement on ANY mill of consequence is not a simple R and R operation.
DO a "bridgeport spindle bearing" search on CNC xone and you'll see a post by me that goes into what one has to do to replace spindle bearings. Do anything but and you'll regret it. It is too complicated and detailed of a procedure to reprise it here.
If you try to oversimplifey the process, you'll grow to regret even having thought of it.
BTW, I used to be a machine tool bearing engineer for a major ball bearing company.