Just doodling in sketchup to figure out the geometry that would be simplest to do with minimal tooling

Spindle Bushings

I came across an interesting video revealing the bushings of a early 1900′s South Bend Lathe.

I’ve worked with bronze before when I machined a hot-end nozzle for a 3D printer (never became functional, but the hot-end worked).

It should be possible to take bronze bar stock which I have left over from that hot-end and drill a spindle hole through it on the drill press.
4 bar block w/ spindle hole

Not sure yet how I would turn the outside. You need a lathe to make a lathe. But a lathe can be very simple…
Spindle hole and machined outside

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