Basic thing to remember is that files are cutting tools. They have teeth with cutting edges. Most are directional.
The file teeth have to be harder than what they are cutting / shaving / scraping, which means that the ones for chainsaw cutters can be brittle, and chip.
If you treat it like a cutting tool, and take care of it’s sharp edges, you will get better results.
Philbert
The file teeth have to be harder than what they are cutting / shaving / scraping, which means that the ones for chainsaw cutters can be brittle, and chip.
If you treat it like a cutting tool, and take care of it’s sharp edges, you will get better results.
Philbert