Chainsaw Repair

How the cutters end up on a loop of chain is sort of like matching edges on wall paper.

There is a certain number of links before the chain repeats itself. On a regular full compliment chain I think it comes out to be four drive links?

So on a full compliment chain with a cutter every other tooth, The total diver link count has to be divisible by four for there to be a even left-right cutter tooth match.

60 / 4 = 15 so that would come out a perfect left-right cutter arrangement with regular chain. 72 / 4 = 18 and this one would too.

With half skip and full skip chain the match is longer or greater.

For example, with semi skip chain, the DL match count is 5 so if your driver link count on your loop for your chainsaw bar is not evenly dividable by 5, You will be missing a cutter or have two left or right hand cutters next to each other or a sometimes dummy link depending on who put it together.

With full skip chain the even match number is 6