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With the thin special file, you have to deepen the gullet at the same time, not just file the front. That's why I got the file so frequently stuck, but the idea is to keep the same tooth's profile/ dimensions. If you look at the automatic sharpening machines for the band saw blades, they grind...

In my experience, the new Silky blades don't tend to bind, even if they haven't set teeth but just a slightly tapered blade. Their nice cutting edges work wonderfully. Things change when the teeth began to dull a little. That isn't much of a wear, but as the taper is so low, the tiny rounding...

I bought this sort of file too because given the price of a Suggoï, I thought that it should be a good idea to spent some time to rejuvenate it. It's a long and tedious project. The file likes to bind in the shallow space between teeth. I made it reasonably sharp again, but not quite as a new...

I noticed something similar, but I don't remember the details. That's not frigged teeth but special teeth made on purpose. They act as rakers to help clearing the kerf from dust and loose bits/fibers. They don't cut but act as a micro dozer. Useful in the angled cuts.