Flat plane 4-cylinder engine crankshaft.
This crank matches my piston/rods:
This design uses my custom counterweights, main journal, and a hexagonal head on the flywheel end to allow for cranking.
Print both halves at once, or print separately for make benefit glorious short print times.
My PLA print settings:
Layer Height: 0.5009
Honeycomb 0.25 fill