This video is a tutorial for a gearbox factory in Industrialist on Roblox. Though it might not be the best tutorial, it still gets the job done.
Link to the game:
https://www.roblox.com/games/9192423027/Industrialist
Or just search it up on Roblox ;)
2:26 - Crankshaft production
8:42 - Plastic casing production
