Is there anything intelligent one can do with dull chainsaw files other than tossing them into the scrap bin?
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They can be ground into various shapes and used as de-burring knives, scrapers, etc.
many years ago, I ground the ends of them to de-burr new recoil rope pulleys, etc.
Use the chain grinder wheel and form a convex radius on the end.
You may find it works better to make several different ones so as to fit various things.
Think of a drill bit point, except the cutting edge is curved inwards by the shape of the chain grinder wheel radius.
Vary your angles a bit and you get a set tools to fit most of the funny spots where you need them.
Examples?
Places where ropes have worn a sharp edge sometimes need a bit of attention.
The hole where fuel lines press into fuel tanks is often another sharp spot that can cause cracks or splits.
After having a new recoil pulley/sheave cut the rope, I made up several of these tools.
Those die cast metal ones were notorious for having burrs or hard corners in the rope hole.
The hole needs to have a smooth radius (not corners) or you'll have a rope failure after a while.
Almost looks like the knot failed when the rope comes out.
Don't ignore a plastic pulleys either! It just cuts/breaks the rope little slower.