I have a Harbor Freight, set on the lowest speed always, with the same blade John is using, probably. I don't change speeds for anything and I cut everything on it easily. The only thing that has given me big problems is African Blackwood because it crams into the teeth and the blade basically stops cutting altogether, so about every 1/2" I cut I have to stop the blade, clean it, and start it up again. Otherwise, everything seems to cut easily on it.