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Re: 25 series chain skipping
Quote:
Originally Posted by jspatz1
AndyMark has apparently stopped tapering and deburing the teeth on their #25 sprockets. They used to include a gentle taper on both sides of the tooth, which should be standard for any chain sprocket, and were tumbled to removed burs and sharp edges. Now they seem to be shipped straight from the cutting operation with no taper, and have sharp edges. They are also now made with thinner .090 material despite being described as .125. We add the taper to both sides of the teeth by gently rotating on a sander, and soften all edges with a wire wheel. This makes a big difference in the sprockets running smoothly, and makes them more tolerant to misalignment.
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Additionally, we've run into some trouble with the tooth profile on some sprockets being a bit off such that you cannot wrap chain around the whole sprocket. Somewhere, the pitch is off just enough to make the chain unable to fit.
I think that may be the likely culprit here.
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