This tiny motor is only a little bigger than a grain of cooked rice (4 x 12 mm), but it can generate speeds over 100,000 RPM.
It’s designed to run at 3.7 volts, but YouTuber Larskro decided to see what these could handle. At 6 volts, he maxed out his tachometer at 100,000 RPM. He got it going even faster at 7 volts, but they burn out at sustained RPMs over 100,000.
Larskro got his on eBay and modded them with two-color blades so the spinning was easier to see.
