A video of Ern's "Hexe" machine to grind both sides of a razor
A video of Ern's "Hexe" machine to grind both sides of a razor
I was chatting with someone about Ern razors and mentioned seeing that he'd invented a better way to do hollow grinds. Found the link I remembered (Carl Friedrich Ern & family introduced the "Hexe" machine in 1893) but learned something new when I thought to look for one on Youtube: a current artisan (Ertan Süer) has acquired such a machine and is using it for some of his current production.
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So, this is just the initial shaping? Nothing to do with honing the edge?
Sort of. I think the initial shaping is done before the steel is hardened and this looks like the final grinding that happens after that but before the the edge is honed. And it all sort of has to do with honing the edge as you'd have to remove waaaay more metal on the stones if there was no hollowing done, even a near wedge has a bit.