andypugh

What the UK calls a "Monkey Wrench" the Germans call an Engländer. (And one features on their road signs for a mechanic https://images.app.goo.gl/Emb1sbXe4MUzMxXw6 ).

Nice work with the brazing. I wonder if MIG brazing would work for that sort of application? (It wouldn't be better, but not everyone has access to Acetylene, and the access is reducing steadily) I would be tempted to skim the sealing face flat on the lathe, it looks easy to hold for that.

Maybe he should paint the photography table 🙂

Do you intend to bend your new ones, for authenticity?

If they were making the parts themselves it might have been as simple as saving faffing about with change gears on the lathes.

Aye, I know. My Ner-a-Car has one, which is what prompted the question.

Is that an artfully aged age-related plate? If so, it's well done.

I think I know who.

I had a motorcycle with a centrifugal oil cleaner, it looks like your cranks has the same feature, but rather by accident. I suspect that the build-up would never block the oilways, but would only collect in the blind bores under centrifugal force.

I am surprised you are not suggesting machining from solid with some extreme thread cutting on a Myford :-)

I have always found Lee Spring to be helpful. They advertise that they make custom springs. I got a wave spring from them, they insisted on sending a sample, and when I pointed out that I would only ever need one, they said that was fine. I assume from what you say that you have tried putting your parameters in their spring finder? https://www.leespring.co.uk/uk_compression_spec.asp?springType=C&subType=H&forWhat=Search You could consider buying oversize and grinding down on a mandrel.

I would have no qualms putting that back in to service. Not that I am any kind of expert. But, what fraction of the bearing surface is missing? 2%?

Probably post WW1, but I just saw this on a Youtube video: https://youtu.be/MbIlBZmZ4Xs?t=333

Cast iron crank-case? I was surprised by that, so far I have only seen (or noticed the material of) Aluminium (Dennis, for example) or Bronze (FIAT) crank-cases of that period.

It seems likely that it could be made, though one might expect it to decompose again (200C, again according to Wikipedia) https://en.wikipedia.org/wiki/Phosgene And that would lead to the emission of CO and Cl, neither of which are particularly good for you either. Though all three gasses probably beat being on fire.