I guess, after using a table saw for over 60 years, I can safely say that I have never had a blade sharpened. Years ago, prior to carbide tipped blades, I sharpened my own, either on a grinder or with a file, but those days are gone forever. Now I only buy carbide tipped blades, usually the 7 1/4" blades that are used in portable saws, ie, skil-saws.
My experience, after over 60 years of woodworking, has been, when the blade gets dull, I chuck it and go out and buy another. However, if I have to do some major cutting of particle board or plywood, I use one carbide blade to do the cutting, and if I want a thin cerf cut, I use a thin cerf blade, and never cut stuff, with my better blades, that have glue in it.
They make very high quality caribide blades that will give you an amazingly fine cut, so why spend the bucks to sharpen a huge blade, that never is used to it's full potential. Most of my cuts are in material less than 1 inch thick, so wearing out a high priced 10 inch blade, which is designed to cut 4x4s on a 45 degree angle, is a waste of time, (at least in my workshop).
Buy a thin kerf blade with a high tooth count for precision ripping and cross cuts, and use that cheaper knarly wider-kerf blade to do the heavy, glue-filled material cuts. Just my two cents, and perhaps I am too cheap to spend the bucks to sharpen a blade that I know is too big to do the jobs that I normally do with my table saw. Large diameters equal high tip-speeds, lots of noise and high cost. Smaller blades equal better control, less expence, less noise, less danger of kick-back and an all-around safer table saw experience I still can count all of my 10 fingers and plan to do so for at least another 40 years..........How's that for predictions?
Long live the economical table saw, complete with proper slides, push sticks and brand new, sharp blades, not of the 80 dollar variety.
Roly, just my 2 cents, which all may not agree with.
