Planetary Gearbox


The latest model in the Archive Project needs a slow turning shaft onto which I can fix some cams. There is limited space under the model so I looked for a reduction gear that was compact. This planetary reduction gear seems to fit the bill nicely!

On the input side the motor turns at around one hundred rpm.

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The output is roughly eleven rpm. One tune every five and a half seconds.planet-a02

There are two stages to the gear box, each reduces the speed by a third.planet-a03

One of the two planetary gears.

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Exploded view. The parts are made from 3mm laser cut plywood. The gears are made from three identical layers bonded together.planet-a05