Six questionably legal pencil sharpeners

A video on YouTube. In Science & Engineering, a Krater category.

Summary by Krater

The creator attempts to build a functioning pencil sharpener using a water jet and an explosive cartridge, testing various designs and configurations.

From the video

Answers: Can you build a pencil sharpener using water jets and explosives?

Pencil sharpener design
Water jet cutting
Explosive cartridge mechanism
Pantograph mechanism
Mechanical engineering

What it concludes

A water jet cutter can create intricate pencil sharpener parts quickly out of a single metal plate.
Using a spinning razor blade on a water jet part successfully sharpens a pencil.
A chainsaw blade mechanism can sharpen a pencil to a cone point.
Using explosive cartridges to rapidly sharpen a pencil destroys the pencil and damages the mechanism.

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