z = theta (Spiral Thingamajig)

Print with raft and supports
This one is a fun one. Helpful for Calc students learning about cylindrical coordinates. I suppose it could also be modified to make an ice drill, for if you are interested in ice fishing, or ice drilling.

Made in USA (in Mathematica) with following code:
Spiral =
RevolutionPlot3D[z = theta/20 Pi, {t, 0, 1}, {theta, 0, 6 Pi},
BoxRatios -> Automatic, BoundaryStyle -> Black,
PlotStyle -> Thickness[.1] ]