Sorry if the title is a bit blunt, but it's basically like this. There's this machine I'm working with. It's kinda using Gear + Chain to drive the output. Initially, they were all driven by gears but the gear is spoil every 2 months. So then it was changed to chain instead but now the problem is that, it's still spoil every 2 months :( But replacing the chain is far cheaper compared to replacing the gears so i guess it's an improvement already. But what i'm interested to improve is basically trying to come up with an idea so that it wont break at all! (At least not every 2 months) So any suggestions? I was thinking use double chains (side by side, not one on top of the other) but then it will be thicker and it wont fit in the 'container' designed for it. At the moment I'm thinking RUBBER BELT, but to be honest I don't know if it can transfer the full speed from the motor due to lack of friction.