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MS880 Sprocket

Discussion in 'Chainsaw' started by Samsonwannabe, Apr 16, 2012.

  1. Samsonwannabe

    Samsonwannabe New Member

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    I recently purchased a MS880 other than being a little slow on chain speed it cuts very well, plenty of power. It comes with a 7 sprocket drive. My question is what would a 9 sprocket do for it? Any help? It is used solely for tree work. Thank you.
     
  2. StihlyinEly

    StihlyinEly Addicted to ArboristSite

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    Think of it like a manual transmission on a truck. The higher the gear, the faster it goes but the less torque it has. Same thing with changing out the sprockets. A 7-pin will give you a lot of torque/grunt in the cut, but chain speed will be slower than an 8- or 9-pin. Leave that long bar on and switch to an 8- or 9-pin, and chain speed will increase, with a resulting loss of torque.

    The 880 is designed that way with the 7-pin because it's a very large saw meant for bucking and felling very large trees, so it has to maintain that torque with long bars buried in big wood.

    You can surely put a shorter B&C on it and run an 8- or 9-pin sprocket, which will give you more speed and maintain torque. But why would you? It would just be a really heavy mofo cutting smaller wood. Best IMO to let the 880 wear its 48-inch bar (or longer) and do what it does best, and run 60-75cc saws in smaller wood.
     
  3. cat-face timber

    cat-face timber Knot Bumper

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    Could not agree more, perfectly said....
     
  4. Karl Robbers

    Karl Robbers ArboristSite Operative

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    Agree totally.
    I haven't done it personally but I do note that Madsens caution against the use of 9T sprockets on work saws as there is a greater risk of chain derailing and such.
     
  5. blsnelling

    blsnelling Site Sponsor

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    I'm sure that 7-pin rim is a .404. That's about the equivalent of a 8-pin 3/8. An 8-pin .404 is huge, and a 9-pin even more so. I don't believe your saw would like that much at all. If you convert to 3/8, then go for the 8-pin.
     
  6. Samsonwannabe

    Samsonwannabe New Member

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    Ms880

    Thank you for your help. It will be used with 48" bar felling big tree's. It is nice having some people to ask for help.
     

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