I am trying to figure out the gear combination that would allow me to crank by hand and exert enough force to crush a can to its flattest state (Possible diagrams or direction on where i could find a diagram of that sort would be appreciated). I have read that it can take around 200-300 lbs of force to crush a can to its flattest state. I have everything else figured out, i just need something to drive 2 arms. I plan through the gears to change rotary motion into reciprocating motion. I just do not know where to start when it comes to the gear combination. Any other ideas are appreciated also.Thanks
Gears are obsolete. Too many moving parts. Try constructing something out of a small hydraulic jack, like people use for changing tires. All you have to do is pump it with one hand and you can exert tons of pressure.
RE: pneumatic cylinder. Web search for BIMBA When you say flattest state you leave a lot of room for interpretation. Some would assume you mean as flat as if you stomped on it while others would think of something that had been run over by a truck. Because of friction losses it will be difficult to precisely figure gear ratios; experimentation with levers should give you lots of information. Incidentally, if you dent the side of the cans before crushing it will be a lot easier. Try standing on one that is undented, then one that is. Or have a friend balance on a can, then tap it with a yardstick or pencil and see what happens.
