Quote:
Originally Posted by Cothron Theiss
I certainly understand; I designed our 2016 bot with #25 chain in mind for all of the sub-assemblies except drive, but the rest of the team was worried about it, so we went with #35. We had experience with #35 from 2015, and we already had the tools we needed, so it was the quicker option at the time. By the time Kickoff for 2017 rolls around, I hope to have the younger members trained and the shop outfitted so they feel comfortable using both and can determine which is better for different situations.
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Defaulting to #35 is a good first step, but you should then evaluate on a use by use basis whether you should switch to #25. There are some applications that a really obvious, like for spinning your intake wheels or rotating a 1/2 pound hood subject to no load on a hooded shooter. Then there are things that are more questionable, mostly different size arms. You could try doing the math (and add a safety factor if you want) or just play it safe with those applications. Or, if you expect weight to be an issue, design the system to work with both chain sizes, so if #25 fails, you can use #35. Overall, I would say #35 is better for drive and large arms, while #25 is better for spinning wheels, small arms, and miscellaneous small purposes.