Help/advice Needed. Magneticanomaly, I share your affection for These Royersfords. Your refurb is very close to what I am setting about to do. I am amateur home machinist with decent lathe and basic tooling, I think, for this effort.
HOW did you bore out the Quill???
I want/need to refurbish quill/spindle on recently acquired Excelsior 21. Old gal was used, a bunch, w/o proper lube plus bottom thrust bearing failed and was ground partly up, sending metal into quill/spindle . Both quill bore and spindle are scored with total slop of about 30 thou. Excelsior drive was hack modified in past so not pristine or a "restore" candidate. Not trying for original precision, only get OK for rough drilling with larger bits.
Current plan is to clean up spindle bore "by hand" best I can, turn down OD on 1 5/16" X 1 1/2" X 3 inch long bronze sleeve bearings to light press fit into Quill. Then turn spindle to clean scoring, deepen original 16 tip threads, fit spindle/bronze bearings to workable bearing tolerance by some combo of boring/reaming sleeve bearings and turning spindle, cut oil channels and holes in sleeve bearings, make 16 tip nuts for spindle(for adjusting thrust bearing preload). New thrust bearings.
Quill has oil channels that I fear will destroy any boring bar cutter (or reamer) I try to use. I hate (and fear) interrupted cuts and have never done internal boring in that situ. Never done much internal boring period. Quill bore is currently 1 7/16", Roughly 3" of boring needed(in from top and in from bottom) to clean quill. Rather than try to clean quill on the lathe, I plan to do best I can to true the repair via turning/boring/reaming the new pressed in bearings and turning the spindle, a plan I think I can implement with ok precision.
Greatly Appreciate any critique/advice on any of the above, including starting a new thread on this if that makes more sense.
Thanks.