Quote Originally Posted by DIYer View Post
That's a great tool! Fast, cheap and easy to replicate. Thanks for the idea.
If you sharpen your own drills there's a simple drill point gage that's easy to make. Use a new, factory-ground drill to drill part way into an aluminum rod. On the milling machine cut away half the rod longitudinally thus exposing the cavity made by the drill. Use this to check the (typically 118 degree) tip angle when grinding your own. It's an especially handy technique if grinding angles (eg 135 degrees) other than those available on commercial drill gages.