Lathe restoration SN20

[Frank S]

Note on the cross slide feed screw handle there appears to be a tapered pin holding it on.
On some models of lathes this handle must be removed then a spacer than a spanner nut then the index dial can be removed. This is where you will probably find 2 allen screws holding the next assembly in place or there will be another pair of nuts on the feed screw and the back dial will be threaded. requiring it to be unscrewed. LeBlond is famous for that little trick. If you have the 2 allen screws remove them and slip the feed handle back in place so you can turn the feed screw just unscrew it out out of the cross slide then the cross slide can be removed I say this as on some lathes the feed nut mounted to the cross slide can only be removed from below Gromatic did this.
Moving on to your trying to remove the side carriage ( gear box) and or the lead screw and feed shaft as well as the start stop shaft You will find spanner nuts on the end of the lead screw behind them will be a thrust bearing. these must be removed to get the bearing housing off of the body of the lathe bed. Additionally on the other end of these shafts on many lathe models there are tapered pins holding them in place Sometimes these pins may have a 1/4 20 nut on them to hold them in place. These pins are dead soft and easily damaged. You can sometimes loosen the nut a couple of turns if there is still any threads sticking out of the nut add a second nut to the stud then tap the pin a few times to loosen it then remove the nuts and remove the pins. then you can remove the various shafts,
If you damage the tapered pins all is not lost as they were used on so many lathes new one can be purchased from a Machine supply store they will need to know the taper the largest diameter and the length of the pin.
If you have these tapered pins and have to drill them out to remove them do so only from the threaded or the small end and take great care not to drill off center.
Once the pins are removed the shafts will slid out.
Good luck with your project repairing these old lathes without a break down sheet is sometimes a challenge in itself just to figure out how they were put together.
Clausing, Lodge & SHiply, Homach, Monarh, Southbend, LeBlond, Atlas Harrison, Gromatic to name just a very few I have worked on all had a few things in common while at the same time all were very different.