I have been working on a robot for the Science Olympiad Robot Ramble event. I’m using chains for some parts of the lift arm and a door on a box, but I keep breaking the chains. Due to size limits of the event, I do not have room to make a more efficient, complex chain system. I have decided to order metal roller chain from an industrial supply company, and would like to know the pitch (in inches) of the chain so I can still use the Vex sprockets with it, as the other company’s sprockets sell for $10 each.

I haven’t read the definition of “Chain pitch” recently; but I’ll bet that it is the same as the pitch of the sprockets and that by counting the teeth on a sprocket or two; and by knowing the diameter of those sprockets, you can compute the pitch value you need.

If I’m correct, Vex chain is made especially from Innovation FIRST and cannot be bought anywhere else. Again, I could be wrong but it seems to me that I’ve seen that before.