Begin by clamping the saw in a bench vise or use a specially designed chainsaw sharpening clamp, either on a log outside, or fastened to a stout piece of lumber in your shop or garage.

Knowing how to sharpen serrated knives can be hard. You don’t use a whetstone, and you don’t drop them off at kitchen stores. What you need is a chainsaw file and a delicate hand. For $10 ...