The largest I've seen pictures of was 1.8x or 2x the size Dave wrote up. Though I do think it was a shaper, not a mill. Doesn't mean you couldn't make one ten times larger, but if you've got the foundry capacity for that, there are other, better, things to do with it. ;)
If you've the capability to pour iron, that would be a really good upgrade to a Gingery anything, but Zamac would be a good choice, too. Nearly as strong as iron, and a third the weight, IIRC my reading, and it melts near aluminum temperatures. Lower, at least a bit, IIRC.
I have a 7x10 HF mini-lathe, bought as a foundational machine for my metalworking shop, and picked up an Atlas MF table-top horizontal mill a few months later. With those and a foundry capability, I don't suppose there is any limit on how much larger a machine I could make. I doubt you have even the limitations I've got, as I've seen some of what you've already done! ;)
Bill in OKC
--- In gingery_machines@yahoogroups.com, drpshops@... wrote:
>
> Hello group
> how large could you make a a ginery mill?
>
> Keith
>
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