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Sprocket

Topic Type: 
Question

Any suggestions on what sprocket to use with this? Sprockets for 2050 roller chain seem to be less common. The ones I see online (http://www.amazon.com/Martin-Roller-Sprocket-Reboreable-Double/dp/B004JXWG0Q) all have bores which are intended to be rebored and which do not have keyways built in. Is it ok to use a sprocket sized for a different size of roller chain?

Also how many teeth in the sprocket?

Thanks!