MICRO BRUSHLESS MOTORS

Sanyo DC Micro Motor Division has developed a micro motor featuring a ceramic air bearing design. The PM series brushless motor design uses air as a lubricant with the sleeve and shaft of the ceramic air bearings containing a 3- to 5-micron gap between them.

At the top of the shaft, magnets repel each other, and once the motor starts spinning, static air pressure is created in the gap. This allows the motor to operate without contact between the sleeve and the shaft. Available in a 20 mm size.
sanyo.com/industrial/
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