Thanks TomKro. I'll check it out. I think I can re-use what I have, but would be very interested if an off the shelf spanner nut worked in the originals place.As to your main bearing take up nut, I have an old Logan 200 spindle that was seriously abused. I set it aside with the thought of checking out the main bearing, just in case it was still usable (bearing still on spindle).
The Logan 200 take up nut looks like it has a 1-3/8 inch x 18 TPI internal thread. Outside diameter is about 2-1/4 inch. If by some chance the your machine uses the same nut, let me know.
TomKro