In this video, I make a Eureka form relieving tool based on the design in Ivan Law's book Gears and Gear Cutting. Having made the tool, I use it to make a set of Module 0.6 gear cutters.
The steps in the video are: make the Eureka tool itself; make the button tools that are used to profile the cutters; make the set of gear cutters.
In the video, I make the mandrel and indexing sleeve for the tool. I had already made the other components.
I made number 2 to number 7 cutters. A number 1 cutter is needed to make gears with 135 or more teeth, which is a size I don't expect to need. A number 1 cutter also requires a button tool with very large diameter buttons, which can be impractical without cutting away portions of the buttons to avoid clashes with the Eureka tool.