I've been trying to make a 0.3mm hot end for a friend who agreed to exchange one for a completed Melzi controller board for my Mendel90.
My lathe is really old, and had been used in WWII by my grandfather to make parts for the war effort. As a result, it's a bit worn, and not really up to this sort of thing.
So last week I decided to replace it with this:
It's a Myford M-Type from 1949. It is in great condition and although it has a shorter bed, it is a bigger lathe.
After almost breaking my back installing it, I successfully bored a 0.3mm hole for the extruder nozzle:
Here is the hot end complete: