Using triangle carbide inserts in a homemade cutter was a bad idea. || RotarySMP

Don't do this. Triangle inserts like these TCMT 110202 have two issues:
1/ being 60°, they always engage, or at least rub on the bottom
2/ there is only one edge to locate the insert in it's pocket, and that is not rigid enough.
The inserts come loose after a couple of cuts, as you can see in the video I made when using it.    • Unreliable tooling is annoying - Scha...  
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00:00 - Intro
00:32 - Plan the dovetail cutter
01:03 - Turn the blank
06:25 - Grinding 7° wall angle mill
12:51 - Testing the end mill
15:11 - Tool holder fell out
17:31 - I dont have the right tap.
18:25 - Broken tap
18:54 - Spring is here.
19:55 - Test the DIY dovetail cutter