Minimalist magnetic stir plate for an 80 mm fan

thingiverse

Just finished working with this device. Its design is remarkably minimalist, requiring only six magnets measuring 8x2mm, part #67488 found at Harbor Freight, and a magnetic stir rod. A touch of super glue was applied on either side of the contact points for the fan because it would be dislodged if spun up too fast. Powering the 12v fan with 5-6 volts seems just right. However, this might change depending on the viscosity of your substrate. The mount was printed in PLA with two shells, two top and bottom layers, and 10% triangular infill. A fillet was added to each corner to match up better with the fan after printing. It friction fits well to the screw holes. The magnet holder portion was printed solid as an experiment at balancing. This doesn't really matter much though, since it's not spinning at very high RPM. This will be included in another project I'm working on, but for now, it will stand alone as its own thing. Small cutouts were made to make them easier to remove from the build plate.