#25 & #35 chains

[eshteyn]

Originally Posted by Andrew Blair

Whoa, this seems like about the ninetieth time I've answered this.

In FIRST, more often than not, #25 is quite adequate- almost never breaking or giving problems- if it's tensioned and aligned very well. If not, you're playing roulette, and it will fail, at some point. Maybe sooner, maybe later, maybe seven times at the Pittsburgh regional in 2006.

My suggestion, use #35 from the gearbox to your first wheel, and then you can use #25 after that. If it breaks, you're still moving.

I couldn't agree more with your answer. We have used #35 chain on our drive system mostly because we are a great defensive robot as well as offensive. We dish out as much as we receive and we select our chain by logical reasoning. We analyze the history of playing of teams at regional events we go to as well as our calculated speed and the estimated speed of the opponent. We calculate the forces on the drive system during regular operation and impact operation and then we select our drive chains. As my physics teacher yells when he smacks his ruler on the desk "IT'S PHYSICS!!!!!!!!!!!!!!!!!!!!!!"