Clearing sawdust from hole-saw teeth
To help keep a hole saw cooler and cutting effectively, it’s important to keep the gullets of the serrated teeth clear of sawdust. For years, I would stop the drill motor, pull the hole saw out of the object I was drilling, and attempt to clear the sawdust from the teeth using a gloved hand or a wire brush. As it turned out, the solution had been right under my fingertips the whole time. Now, I merely reverse the rotation of the hole saw while it’s still positioned inside the groove; this action clears all the packed sawdust from the teeth. If I do this often during a cut, I can keep the blade temperature low and prevent the sawdust from sticking to the sidewalls of the hole-saw blade. My cuts are now faster, and there is little hole-saw cleanup to do when I’m finished.
David White, Cupertino, CA