Uploaded April 2026 | Updated September 2026, 2 weeks ago

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In preparation for a future prop replica project, Adam gets practice with tool he's never shown before: a Holdridge Radii Cutter for making a perfect sphere. In this case, he's going to use it to attempt to make a perfect hemispheric void out of richlite on his lathe. The trick: lining up the radius cutter to be perfectly center to the material. Would you call this a hemisphere or a demisphere?

Shot by Adam Savage and edited by Joey Fameli
Music by Jinglepunks

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