Choosing the right chainsaw chain doesn't have to be complicated. You just need to match three key specifications. Here's what they are and where to find them.
What it is: Chain size, calculated by measuring the distance between any three consecutive rivets and dividing by two.
Common values: 1/4", .325", 3/8", .404".
Why it matters: It must match the drive sprocket and the guide bar nose sprocket.
Where to find it: Check the stamped number on the drive link of your old chain.
What it is: The thickness of the drive link that fits into the guide bar groove.
Common values: .043", .050", .058", .063".
Why it matters: It must match the guide bar groove gauge.
Where to find it: Check the stamped number on the drive link of your old chain.
What it is: The total number of drive links on the chain. This determines the overall chain length.
Why it matters: It must match the guide bar length. Even bars with the same stated length can use different drive link counts across brands.
Where to find it: Count the drive links on your old chain.
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