Some time ago I built an aluminum pallet for machine set-ups. During the construction of the pallet I broke a tap. I this video I use a carbide drill to remove most of the tap in order to remove it and I rethread the hole using a Helicoil thread insert.
Details on the Omegadrill that was used in this video;
https://www.mcmaster.com/2624A13/
Building An Aluminum Pallet
https://youtu.be/RhPX3RHiMDQ
For channel stickers and information on my Precision Ground Flat Stones email me at; [email protected]