Another fun project idea: making a DIY overhead stirrer. Something like this but simpler.
I think I already have a suitable 12VDC reduction motor somewhere, and I have spare adjustable DC power supplies (12V 2A and 12V 5A) that I could use to control the speed. I would need a chuck and something to attach the motor to my lab stand. Also, a stirrer attachment.
I can’t find my big gear motors right now, but I do have a cute little 6V 30 rpm one and a 24V 18 rpm one. Plenty of torque, but slow and I think they’re only about 3W continuous.
Ideal would be something like the one in the video, which is the larger ~15W continuous cousin of my mini reduction motors. I guess the 470 rpm one would be nice. I could easily attach a drill chuck to the 8mm shaft using a JT0/B10/B12 connecting adapter, then I don’t have to fabricate anything like the guy in the video did. I think B12 is the right size if I mainly want to use it with 6mm and 8mm stirrer attachments. Either that, or an M10 adapter with an M10 chuck.
I’m going with the M10 option. It has better reviews, it’s not missing the set screws and I like the chuck better.
For attachment, I think I will go with the very simplest option first: just clamp it to the lab stand with a lab clamp straight onto the motor. The motor would be facing sideways but that doesn’t matter. If I like the setup, I might find a better solution. Perhaps a piece of 12mm rod with two hose clamps or something.
I’ve ordered a reduction motor, M10 connector, 1.5-10mm drill chuck and stainless paddle stirrer for €25. That should be everything I need, besides the stand, clamp and adjustable power supply I already have.