Originally Posted by couch
My post was in response to ott1. Posting from my phone so no quote option.
Simply pointing out that he said you NEED a key way cutter, which is not the case.
I'll be using my mill for this project. May open up my doors for others in the area as well.
Keyway cutter is the correct and proper way. You can also do it with a file but it's halfass maybe a three-quarters-***.