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Originally Posted by

**philbur**
PS: If compound angles where needed machinists would have to be mathematicians, consequently there wouldn't be any machinists.

LOL! Or you could take the modern short-cut of rendering the tool bit in your favorite CAD, aligning the axis however it's going to sit in the tool and cutter grinder, projecting the 30° cutting angles and reading off the resulting 3-space angles.

Basically, what Brian did on his HSS sharpening jig in Solidworks.

He probably can do it faster than it took me to type this post

*"Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did."*