What is chainsaw chain pitch?

If this marking does not exist then we need to next work out the pitch of the chain. The pitch is the distance between three of the chain 'rivets' divided by two.

Chain saw pitch diagram

Chain is made in several pitches - 1/4" is the smallest, 3/8" is the most popular, 3/4” is the largest. Pitch is important because the drive sprocket must be the same pitch as the chain

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