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Transmission Driving 'Large' Gears
Here a transmission drives two of our largest gears – each is more than a millimeter in diameter.

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Transmission Driving 'Large' Gears – Clip Two
The two large gears are being driven by a microengine operating at 6000 RPM. The transmission has been driven at speeds as high as 60,000 RPM.

Quicktime (283K)
AVI (712K)

Spring Device
Here a spring device is wound and unwound. Perhaps one day a micro-clock can be made with this type of mechanism.

Quicktime (218K)
AVI (600K)

Spring Device – Clip Two
In this video, the spring is wound and unwound by a microengine operating at 6000 RPM.

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AVI (588K)

Linked Gears
Here, a transmission drives two linked gears while the microengine runs at 60,000 RPM.

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AVI (464K)

Torque Demonstration
This is a microengine driving a gear approximately 40 times its own diameter, demonstrating the large torque it can produce.

Quicktime (708K)
AVI (1187K)

Microengine and Gears
This microengine's drive gear is turning a 250-tooth gear more than 10X as large as itself. The speed of the drive gear is 600 RPM, and it has been operated as fast as 60,000 RPM.

Quicktime (887K)
AVI (1483K)

Microengine, Transmission, and Spring Device
This video pans from the microengine driving the device, through a transmission that multiplies the torque, to a spring that winds-up and drives additional gears.