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Unread 27-10-2012, 17:07
Jibsy's Avatar
Jibsy Jibsy is offline
Mentor - 3756, 4525
AKA: Jared Baribeau
FRC #3756 (Ramferno)
Team Role: College Student
 
Join Date: Jan 2011
Rookie Year: 2011
Location: London, Ontario
Posts: 95
Jibsy will become famous soon enoughJibsy will become famous soon enough
Re: #25 Chain Drive Experience ???

3756 used #25 chain last year without issue. It does stretch quite a bit, meaning you have to either remove links or have some sort of other tensioning system to adjust every once in a while.

I personally love working with #25 chain... it feels almost like working with jewelry compared to #35. As mentioned by Joe though, it's quite a bit more picky in the way of sprocket alignment. We used 1/6" plastic spacers (from McMaster IIRC) to line them up, and they never popped except for when one of our sprockets came lose.

We use the #35 chain and sprockets that we have sitting around from the KoP for prototyping and practice bots, but I don't see us ever leaving #25 and 1/16" spacers for competition. (Edit: We had undersized aluminum spacers, leaving space for adjustments with the small plastic ones).

Here's a picture of our 2012 drive train. We had slots in the wheel brackets for tensioning. Worked well, but a pain in the rear to adjust in a 10 wheel drive -.-

Last edited by Jibsy : 27-10-2012 at 17:10.
 


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