No I did get it, I'm just trying to discuss the alternative to the typical method of connecting the various parts of a press-together crank, by having high precision mounting surfaces made by EDM gear, with the intent that it both perfectly aligns the two parts and also locks them together to...
"Something (well... your posts) tell me you haven't done any stress evaluation yet, or put any thought into that aspect of your design."
Yes, I did mention that.
"Your interfaces must be press fit. It's not optional."
Of course they are. I'd have to sit one part in a bath of liquid nitrogen...
Here's a view with a little bit of the crank cut off so you can see the main journal a bit better. Note the parallel sides on the pin. It can only go in one way (unless you fit it 180º out!) and so quite accurate.
I'm not sure how you're not getting this - The areas where they join wouldn't be round the entire way around, they'd have a couple of parallel sides to the parts can only go together one way and with perfect accuracy.
You can't see it very clearly in the screen captures above, but I have a way...
You should have another read of what I wrote. I wrote that instead of the usual round mating areas, by using very accurate EDM gear I could make them fit very neatly & accurately. No need to align anything because they only go together one way.
I do like the idea of using roller bearings as...
I'm designing a V8 engine, mainly for the challenge, and I've been trying to decide on either a conventional billet crankshaft or a press-together one. I have no doubts that the plain billet crank would work just fine, but I don't want to discount the advantages of a press-together type as it...
