Keyway clean up file

[Frank S]

Ordinarily I hold files as tools that are a cut above being subjected to my ingrained nature to modify just about any tool to suit my needs.
However, a sprocket I had cut a keyway in still lacked just a scooch more depth after broaching it on my lathe using the carriage like a shaper. I could have returned it to the lathe but I already had another setup in it so I decided to just file out the remaining bit the only problem was to do this I either had to use a much smaller narrower file than the keyway or transform another file into a special purpose tool.


At least it was an older file but still sharp