Customizable Pottery Wheel Throwing Jig (aka Tombo Stick) with Shrinkage Calulator

thingiverse

This is an adaptation of a traditional tool for wheelthrowing called tombo sticks. They're for making consistently sized pieces in production settings or for sets that require precision like nested bowls. You can also adjust the percentage for shrinkage so your tool is the correct size for the stage clay you're working with. This is customizable with the variables shown in the images. You can also change the model sizes as well the clay shrinkage. This has not been tested on all shapes, but should be good for bowls, plates, mugs, and cylinders. I also added some of my own tombo templates using a 13% shrinkage rate clay. Using the customizer you can generate your own of course :) Just find your favorite sized bowl and take all the measurements, then plug them in and voila!