Two additions to my shop tooling.

[Highpower]

Something else to remember is that more flutes = less material in the tap itself. Not much material there if you look at the cross section of the broken tap is there? Never try to "power tap" with a 4 flute tap. Hand tapping only.

You will be amazed at how much more torque a spiral point 2 flute tap will handle and how much easier they cut compared to the same size 4 flute tap. Even brand spanking new ones.