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Thread: Chainsaw Link Removal....

  1. #16
    Join Date
    Jun 2005
    Location
    Texas, ILL.
    Posts
    1,202
    Steve, all over the world -- car plants, power plants, steal mills, candy factory, tire plants, Caterpillar, John Dear and any other place that incorporates chain drives has chain stretch. The term on the maintenance technicians work assignment notice is generally " chain stretch on xxxx- replace same with xxxx"

    Must be only on chain saws they don't stretch.

    Call it what you wish, the bugger is just plain worn out, if you cannot adjust it any more.

  2. #17
    Join Date
    Feb 2004
    Location
    Virginia Beach, Virginia
    Posts
    70
    If your chain is worn to the point it will no longer adjust, it is time to replace it. The rivets and rivet holes have worn to the point you can no longer take it up. It doesn't seem like much, but a very small amount of wear causes considerable lengthening. If each rivet is worn only as much as 0.010", times a hundred rivets, that's a full inch - or just under a half inch of bar adjustment. Even a relatively short bar will carry a chain with several hundred rivets.

    The proper number of drivers for your Stihl bar will be etched on the side of the bar beside an etched picture of a drive link. If that number is, say, 72, you will want to buy a chain with that many drive links. In Stihl parlance, the drive link number is the last number of the chain loop designation, as in:
    "26RM2-72", where the 2 is the pitch, the 6 is the guage, the letters are the type, and the 72 is the length.

    Whatever caused your old chain to wear prematurely, be it lack of oil, dirty oil, loose adjustment, dull chain, rakers filed too deep, excess downward pressure, etc. etc., you can bet your drive sprocket has taken the same beating. Since the drive sprocket has worn to match the old chain, it will not exactly match your new chain; the new drive links are closer together than the old worn ones. A worn out sprocket will prematurely wear your new chain until they match again.

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