I am building this engine from the plans available here :- http://www.vapeuretmodelesavapeur.com/telechargements4/h-potty-mill-engine-09-02-08.pdf
and would like some advice as to how to machine this component
It is the crankshaft and would appear to be turned from a piece of flat bar 18mm wide by 6mm thick. I have both lathe and milling machine but I don't fancy turning the main part of the shaft due to the interrupted cut. Should I mark it out and mill away most of the excess or just go for it?
Any and all advice gratefully received.
George
I’d be making it from the rectangular bar as described by bencsly. you can drill and ream your big end and small end holes accurately first. intermittent cuts are unpleasant, but sometimes necessary.