Heres a vid of my first real time experience using shrink fit tooling and a torch instead of induction heating. I'm also using a little spinner dohickey I made for keeping the heat even. Worked ok but learned a couple things
It seems you were in a hurry to get the video done. I think you should also make a holder for the torch so that you can use both of your hands. All in all cool content.
I'm wondering if a TIG welder could be used instead of a propane torch for small chucks? (this one is large, but lets say chucks for ∅3mm tools). If the electrode is completely flat instead of sharp, that should spread the heat, and since the chuck is well balanced we could possibly spin it fast enough to avoid melting it. The advantage would be a better control of the heating, since the current of the TIG welder can be precisely adjusted by an external control circuitry. So the temperature of the chuck could be measured in realtime using an infrared diode (shielded from the light emissions from the plasma obviously), and the current of the welding machine and speed of rotation adjusted accordingly. A difficulty would be to keep a good argon shielding around the electrode though (as the piece would be rotating rather fast).
