UK Karting - Notice Board (2-Stroke Karting) : Re: chain lengths ??

Notice Board (2-Stroke Karting)

Re: chain lengths ??
Posted by 'SimonS' on 23 Feb 2009 @ 22:58

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SimonSJoined: December 2004
Total Posts: 4
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The easy answer is to download one of the sprocket calculators eg http://wareseeker.com/free-sprocket/

Usually one is fairly constrained with a kart

but:
the two centres (crankshaft and axle) should be between 20 and 30 chain pitches apart. (Normally it is 30 to 50 cp, but under a pulsating load reduce to 20)

For normal karting purposes, the distance between the two centres must be larger than the diameter of the large sprocket - diameter of the small sprocket

There must be 120 degree minimum contact on the driving sprocket (more isn't bad, but 120 is best)

The number of links is found by the formula

2C+S/2 + K/C

Where C= distance between centres in chain pitches
S= number of teeth in Small Sprocket + number of teeth on large sprocket
K=number of teeth on large sprocket -number of teeth on small sprocket

It should be fairly easy to use excel to make up a table that shows for any combination of sprocket the chain lengths (only available as even numbers)

Oh yes, when the chain elongation exceeds 1.5 percent, then it is time to scrap it (that equals a link and a half over the average chain)
or if you get extra wear on any one link.

Have a look at:
http://www.misumi-europe.com/www/catalogues/FAEnglish/eucatalogue/pdf/45/E_FA_08_2543_2544.pdf

Does that help?

Message Thread:

chain lengths ?? by 'buzzinrussell' (23 Feb 2009 @ 15:57)

Re: chain lengths ?? by 'yeoy' (23 Feb 2009 @ 16:43)

Re: chain lengths ?? WHAT DIFFERENCE? by 'cosgrove78' (23 Feb 2009 @ 17:06)

Re: chain lengths ?? WHAT DIFFERENCE? by 'John' (23 Feb 2009 @ 17:16)

Re: chain lengths ?? WHAT DIFFERENCE? by 'cosgrove78' (23 Feb 2009 @ 17:20)

Re: chain lengths ?? WHAT DIFFERENCE? by 'richydehav' (23 Feb 2009 @ 17:35)

Re: chain lengths ?? WHAT DIFFERENCE? by 'itpro' (23 Feb 2009 @ 17:36)

Ian to start a discuison by 'stecrmh51' (23 Feb 2009 @ 17:41)

Re: Ian to start a discuison by 'buzzinrussell' (23 Feb 2009 @ 18:26)

Re: Ian to start a discuison by 'MJC' (23 Feb 2009 @ 18:55)

Re: Ian to start a discuison by '5kyle8' (23 Feb 2009 @ 22:29)

Re: Ian to start a discuison by 'itpro' (24 Feb 2009 @ 1:28)

Re: Ian to start a discuison by 'itpro' (24 Feb 2009 @ 1:36)

Re: Ian to start a discuison by 'Volts' (24 Feb 2009 @ 7:24)

Re: Ian to start a discuison by 'itpro' (24 Feb 2009 @ 11:26)

Re: chain lengths ?? by 'SimonS' << You are here!

so i guess its not?? by 'cosgrove78' (24 Feb 2009 @ 12:00)

Re: so i guess its not?? by 'SimonS' (25 Feb 2009 @ 17:21)

Re: chain lengths ?? by 'Daddyfix' (25 Feb 2009 @ 21:46)

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