29 Jan '14, 6pm

Ball Bearing Motor Rolls for Reasons Unknown

Ball Bearing Motor Rolls for Reasons Unknown

[RimstarOrg] has brought us an oldie but goodie this week. He’s built a ball bearing motor , a design which has been causing engineers and scientists to squabble for decades. [RimstarOrg] used a microwave oven transformer with a 70 turn primary coil and a single turn secondary coil to create a low voltage, high current AC power supply. Needless to say, there’s a real risk of fire or electrocution with a setup like this, so be careful if you try this one at home. [RimstarOrg] then built the motor itself. He de-greased two ball bearings then installed them on a metal shaft along with a wooden flywheel. The entire assembly was then mounted on a board so the wheel could spin freely. Two copper straps hold the bearings to the board. Finally, the transformer is wired into the copper straps. In this configuration, the current will flow through the outer race of one bearing, throu...

Full article: http://hackaday.com/2014/01/29/ball-bearing-motor-rolls-f...

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