Quote:
Originally Posted by AustinSchuh
971 ran them last year, and had no issues. They are quite a bit lighter. But, they are a lot more expensive than steel. Your call there.
I personally won't put a chain run on one of my robots without some sort of tensioner, but if this has worked for you in the past, then go for it. I know that 233 has run 25 chain without tensioners, and it has worked for them.
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We also used 22T 25p 7075 aluminum sprockets in our drivetrain this past year without any problems, but we ended up machining them ourselves from 1/2" 7075 plate (which was cheaper than buying steel sprockets). We designed for initial exact chain length, but needed to add tensioners as the chain stretched. For that, we ended up just throwing in some of our Lexan floating idlers (which are quite possibly the lightest possible roller chain tensioner ever), and they worked without any problems.