Inductive heater
#11
I also bought one a few years ago from China. Yes, the pump pumps water thru the coil. For a power supply I bought a 20A supply from some other Chinese vendor really cheap. I *still* haven't tried it out. Heat treating is exactly what I bought it for. Somewhere, probably here, I read about a company using an electromagnet to hold parts in the air as they passed thru the induction heater. When they were hot enough they were no longer held by the magnet and dropped into the oil bath below. I was thinking something similar on a much smaller scale.
Logan 200, Clarke 7x12, Index 40H Mill, Boyer-Shultz 612 Surface Grinder, HF 4x6 Bandsaw, ...
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#12
If all you want to do is harden small cutting tools then the induction heater will do.

But I think you would be better off building yourself a furnace so you can hold larger/thicker items at temp to soak them. When I had my small muffle furnace torn down to convert it I was surprised by how simple they really are. The second part I wanted to heat treat was too long to fit into the small furnace of course. Since then I bought most of the stuff needed to build a second (deeper) furnace. The insulating brick was probably the most expense. Other than that it's just a frame/case, some heating coils, a cheap PID controller, solid state relay and a thermocouple.

As usual finding the time/desire to put it all together now has been my biggest hurtle. New projects keep pushing back the old ones. Slaphead
Willie
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#13
My idea, when I bought this thing, was making wood turning tools. The actual tool part woulda been drill rod then a 1018 holder onto a wooden handle. Still may do it.
Logan 200, Clarke 7x12, Index 40H Mill, Boyer-Shultz 612 Surface Grinder, HF 4x6 Bandsaw, ...
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