Gene, any chance we can get an image of what those reground blades look like? I'll have a chance soon to try my hand at saw blade sharpening when I aquire my father in laws foley-belsaw equipment. When that happens I'll start playing with yard sale finds.Gene Howe wrote:My dado set is a Tenryu and used to cut huge bat wings. I intended to use the set for box joints and the bat wings were a no-no. I sent it out to have the two outside blades re-formed to eliminate them. I'm not sure what the sharpening service did exactly but, when I got them back not only did it produce absolutely flat bottomed dadoes, but there was no tear out in hardwood or plywood.
Possibly, if you describe your tear out problem to a good sharpening service, they might be able to sharpen the set to a configuration that would at least minimize the tear out.
in the mean time I'll give all the great suggestions a try.