If a chainsaw cuts at an angle rather than cutting straight, then the problem most certainly lies in the guide bar and chain assembly. Adjust the chainsaw bar: If possible, adjust your chainsaw bar on a bench before continuing. Use a bar cleaner handle: A bar cleaner hook tool removes debris stuck in the bar’s rails.
I’ve also seen chains that were brend new at the start of the day, cutting cut circles by the end of the day due to someone hitting dirt/sand/rocks or pushing the chain way longer then they should have. If the chain is damaged like it would be if its cutting arcs take the chain to a saw shop to get the chain sharpened. Bottom line, if sharpened at the right angles, and if sharp……it will cut straight.
When the saw teeth become chipped, damaged or dull, the chainsaw likely won’t cut straight, especially if more teeth are affected along one side of the chain. Sharpen the teeth uniformly using a file and file guide, or take it to professional for sharpening. Madsen’s recommends using a grinder rather than a file, if you want to avoid taking it to a professional.
chainsaw not cutting straight Related Question:
What causes a chainsaw to cut at a slant?
Check the size of the top plates, which sit on the longer sections of each tooth on the chain. These top plates should be the same size. If some are shorter than others, file the longer ones down to match. Keep the same angle on all the top plates as you file – angles that don’t match also can cause curved cutting.