Retipping Sawmill Blades
There are a couple of different types of fixtures and tables available. They range from a lazy Susan type table to fixtures that allow you to adjust angles and clearances. The more advanced ones allow you to take a pre-ground tip, one that is already ground to precise tolerances, and braze it to the blade with even side clearance. I don't know where there are any used ones, but look for the word Accuground (as in Pacific Hoe's fixture) or "adjustable laying block" if you plan on using pre-ground tips.
From the original questioner:
I think I will stay away from the re-tipping fixture. I checked the run out of two blades and there is .016" run out on one and .020" run out in the other. I think a sawblade doctor could put them right on the money by grinding the tips after installed. I also feel there would be less vibration if the blade and tips are held to a closer tolerance. Does anyone know what steps a good saw doctor does to make a finished blade?
They would check the plate for flatness and tension with a straight edge and adjust it with either a stretcher roller, hammer and straight edge, or both. Then if the blade needed to be retipped, they would tip with a regular (unground) tip, then side grind, face and top grind so the clearances would be even. The smaller shops without grinding equipment use the pre-ground tips and a fixture so they don't have to side grind the tips - they face grind only.
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