When Chainsaw parts were somewhat softer than they are these days my Dad used to say,
Ne careful doing this. It's not just the opening up of the top of bar groove, which can be fixed by closing it up, but the narrower chain laying over can wear the inside walls of the groove which cannot be repaired. Then when using 063 chain on that bar the drivers will lack side support and the chain will find it easier to lay over even if he rails are true.
Great tail here. I two recently ran into a problem milling. Unfortunately it is always costly to replace something, in my case, I am running a .058 chain in a .063 bar, and if the chain is not sharpened exactly as required, things go wrong. . . . .
Ne careful doing this. It's not just the opening up of the top of bar groove, which can be fixed by closing it up, but the narrower chain laying over can wear the inside walls of the groove which cannot be repaired. Then when using 063 chain on that bar the drivers will lack side support and the chain will find it easier to lay over even if he rails are true.