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Despite Andre’s concerns, it actually works.
For those who didn’t follow the link to André’s comments, he said:
Nice work on the original structure.
But I fear that the treadle lathe is not going to work. The large drive wheel is not heavy enough to have enough strength to get on the rotation axis. The large drive wheel must weigh 35kg minimum for easy turning.
This weight is for a wheel diameter of 600mm.
Myself early this year a treadle lathe built, pictures can be found here: http://hout-en-boten.blogspot.com