CRANKSHAFT – early steps
The triple expansion steam engine crankshaft has 6 main bearings, 3 big ends, and 4 positions where eccentrics attach.
It is about 240mm long, machined from 50.8mm mild steel rod.
The mains are turned from centrally positioned centres, the big ends from eccentrically positioned “centres”.
And this is how I would like to make a crankshaft…