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Author Topic: Sprocket sizes  (Read 563 times)

StefanN

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Sprocket sizes
« on: 02 June 2020, 09:34:59 am »
I'm assuming there is some payoff with using the smaller drive sprockets.   A 10T sprocket will cause the chain to flex more, transmit the force through fewer teeth etc?  Is that correct and can anyone point me to some data about this?

Is there minimum sprocket size for a particular chain size?   Specifically, what's the smallest (tooth count) sprocket that you can use for a 420 chain?

Are there particular things to beware of when running very small sprockets?

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Ron

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Re: Sprocket sizes
« Reply #1 on: 02 June 2020, 01:38:16 pm »
420 chain (#40) is listed as min UTS of 3125 lbs and the recommendation on the Erik's website is to run at ~ 1/6 or less of that during continuous running .
A ten tooth sprocket would just limit the input torque compared to a bigger sprocket to prevent excessive tooth/chain roller wear which as I've found with a 7driver 21driven tooth combination running too much torque that the small one wears alot faster than the large sprocket and makes the chain very baggy.