Video-How to Design a Pencil Sharpener with Planetary Gears

Yes, planetary gears can even be found in pencil sharpeners. This is an unusual situation because there is no sun gear in the system. Also, the carriage is input and the planets themselves are the output.

Let’s explore this unique creation that has been right under our nose for years.

Corey Rasmussen

Corey Rasmussen is an award-winning professional engineer (NC and TX) with over 20 years of product design and development experience. He has two patents related to aerial lifts machinery, has advanced certifications in hydraulics and electronic controls, and specializes in designing mobile equipment. Corey is the principal engineer of Rasmussen Designs and is based out of Durham, NC.

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