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Originally Posted by maxlobovsky
Any reason for avoiding them? It wont be too hard to have a slightly adjustable wheelbase in our design, but i thought it would be simpler to take just put in or remove a half link.
How long will this stretching take? Will the majority occur during practice so we can have the robot properly trimmed before the competition?
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Half-links (single pitch offset links) tend to be weak. There are double-pitch offset links that are stronger. See
http://www.diamondchain.com/techfaqs.asp items 17 and 18
If you are using #35 chain and do a good bit of practice, a lot of the stretching should happen before you get to the regionals. However, use a good chain lube periodically and watch the tensioning. Use of a very small sprocket close to a large one (a la 10:45) will require close attention to prevent the chain skipping off. See item #2 in the Diamond tech facts.
Also see this collection of facts, drawings and application notes:
http://www.drivesinc.com/roller-PDFs/rollr-enginfo.pdf