#25 Chain

[Michael 4499]

Originally Posted by Sh1ine

Hi Folks,

Typically we use belt for our drive train. This year with the bigger wheels we are decided that we wanted a stronger transfer method so we switched to #25 chain. We are running 8" AndyMark Pneumatic wheels, with a WCP Dual Speed Gearbox. Our low end is about 6 fps and the high is about 12 fps. We keep breaking chain. Is anyone else having problems with the large wheels breaking the chain? Some on the team want to switch to #35 chain, but that seems like overkill to me. I feel like we must be doing something wrong, not that the chain is too weak.

Thanks!

We started off running 9mm belts inside of our tubes running 8in pneumatic wheels which caused too much slippage so then we swapped to #25 chain like you and haven't had any problems since. The only time that one broke on us was when we had a power-pull get trapped in the drivetrain. Our drivetrain is even faster going at 20fps and it has been great. I'm not quite sure what is wrong with your setup but #25 chain should be able to handle the loads. Maybe a picture would help diagnose the problem.