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Cogs for double-pitch roller chain
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Posted by nballen on January 08, 2007 at 15:46:22 from (198.246.171.252):
Gary, When I saw the pictures on your last post, I thought I would ask this question - Is there a rule of thumb for the cog diameter when using a standard-pitch cog for double-pitch chain? A couple weeks ago, I was running a spreader and the original cog on the pto shaft (NI spreader, #60 double-pitch chain) let loose. The proprietor at one of the bearing shops we stopped at mentioned that a double-pitch chain would tend to "climb" on a cog (sproket?) with an even number of teeth, if the cog is above (below?) a certain diameter. So we dutifully kept searching until we found a cog with an odd number of teeth (31 it turned out). Have you heard anything like this before? My neighbor has dealt with this gentleman for ~15 years, and he has a good reputation. Thanks for any (and all) input. Nathaniel
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