The frequency of replacing your table saw blade depends on several factors, including the type of material you cut, the quality of the blade, and how often you use the saw. As a general guideline, you should replace or sharpen your blade when you notice a decrease in cutting performance, excessive chipping, or burning on the wood. Replacing your table saw blade could be necessary after several months or even a couple of years, depending on your usage. Regularly inspecting and cleaning your blade can also help extend its life.