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Tool Talk Discussion Forum

Husqvarna 288 Drive Sprocket Question

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Polish Mike

10-24-2004 08:59:55




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I need to replace the drive sprocket on my saw. The present sprocket is 3/8 x 8. The Husqvarna dealer only had 3/8 x 7 in stock. He said there was no real difference. I'm thinking, there has to be a difference, otherwise they wouldn't have made different sizes !!!

So the question : What's gonna be the result when I put a 7 tooth sprocket on to replace an 8 tooth sprocket ?

Thanks guys !

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robert gunt

01-07-2006 15:03:16




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 Husqvarna 350 drive spocket removal in reply to Polish Mike, 10-24-2004 08:59:55  
Time for a new spocket, got one but don't know how to lock the shaft, to unscrew the clutch. Can any one help?



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Van in AR

10-27-2004 17:43:53




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 Re: Husqvarna 288 Drive Sprocket Question in reply to Polish Mike, 10-24-2004 08:59:55  
7 pin sprocket will lower the chain speed and increase the torque delivered to the chain 8 pins sprocket will increase chain speed but may cut slower as the saw will need more power to maintain the torque needed. Some saws do better with a 7 some a 8. Rim sprockets are about $4.00 each, experiment.
Van



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NC Wayne

10-24-2004 16:42:30




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 Re: Husqvarna 288 Drive Sprocket Question in reply to Polish Mike, 10-24-2004 08:59:55  
The only difference is gonna be the in the chain speed and torque. This might not be the "proper" way to explain it, but look at it as you would any other kind of chain drive. When you look at the nose of the bar it has a second sprocket, and going from a smaller sprocket to a larger sprocket gives you an increase in torque. As a result if you change the drive sprocket to a smaller size in effect your decreasing the speed of the chain slightly and increasing your torque slightly as a result. I don't know what the max RPM is on your saw but I don't think you'd ever notice the difference in either the speed or the torque. Just my .02

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