1,000,000+ rpm

3.8 Million RPM 1338mph 2153kph 24.3 Million Gs (2 min 43 sec)

12-31-2020 My new video using a completely new circuit, fets, sensors and smaller balls. A lot of info in the video description.

PMBO 2020 By -Oz- 2 Million RPM (3 min 4 sec)

2,088,600rpm, 733mph, 7.3 million G's (2 min 38 sec)

1,000,000 RPM and Explosion @ 688mph (0 min 48 sec)

1,000,000 rpm was not fast enough.

Seeing how fast I can spin an object. Using a a magnet ball, this is a simple brushless motor (without a output shaft of course).

Today (5-2-2019) I got to 2,088,600rpm, 34,810 rev's per second, 733mph on the equator and 7.3 million G's, then the ball turned into complete chum, lol.

Simple hall sensor, fet drive circuit and coil. Coil is made up of 33 turns of wire AWG #25 (0.5mm, 0.02") wire diam, avg 18mm coil diam, measures 20uH, 240mΩ. Coil power supply, 20V, 5A C.C setting, avg coil current 3.45A, ~69W (at speed), hall and driver supply, 5V ~12mA.

Two years ago I got to 1 million rpm, but never took a video, then a couple months ago I saw another TY video that sparked me to get a video of my results.
I made a video of the 1.1 mil rpm, then I had some ideas to optimize my setup. Better sensor, fet driver, smaller ball and more coil drive power.

3-14-2019 1,141,200rpm, 19,200 revs per sec, 668mph and 3.64 million G's (at the equator),
4-26-2019 1,579,800rpm, 26,330 RPS, 555mph and 4.18 million G's,
5-1-2019 1,715,400rpm, 28,590 RPS, 602mph and 4.93 million G's,
5-2-2019 2,088,600rpm, 34,810 RPS, 733mph and 7.32 million G's.
5-8-2019 2,232,000rpm, 37,200 RPS, 784mph and 8.3 million G's.
5-9-2019 3,176,400 RPM - 52940 RPS - 1116MPH, 16.9 million G's.
EDIT: 5-17-2019 3.348 Million RPM, 55,800 RPS, 1176MPH, 1893kph, 18.8 Million G's.
EDIT: 5-21-2019 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's

Sometimes the ball sheds just its red skin, other times it sheds is copper/nickel skin, and the unlucky ones turn to chum, poor little bastards Sometimes it give off a flash of light or sparks, maybe that's it's ghost leaving.

Pretty much every 5mm ball disintegrates (explodes) at ~1.1 million rpm sofar. That is why I switched to 3mm balls, but that also introduced other issues to overcome. i am putting the 3mm ball magnet in a nylon standoff that has been drilled to allow the ball to drop in, then another nylon screw to hold it in place (with some free play).

Wear eye protection if you try this, be safe, have fun.

Seems this is the worlds fastest 60 billion revolutions per minute

EDIT: 1-1-2021 I revised my circuit, new fets, fet driver, sensors and gave it another go with new 2.5mm balls. With some debugging/troubleshooting I got it all to work, but the balls let me down, all explode from 2.0 to 2.3Mrpm. Video added above.