One way to make similar-sized pottery plates, bowls and mugs is to start out with a given weight of clay for each item. Here’s a handy chart of recommended amounts of clay needed for certain items. But I have a hard time throwing consistently-sized items even if I do start out with equal weights of clay. It would be nice to make a set of four mugs that are nearly the same size on purpose and not by accident. A pottery throwing gauge is a tool that is supposed to help you do just that. You set the gauges to the height and width you want your piece to be and, if you don’t knock it over, you might end up with an evenly-matched set of bowls or mugs.
I’d never even heard of a pottery throwing gauge until I saw this video by Florian Gadsby on YouTube. I was intrigued needless to say. I love tools but I’m not the kind of person who buys tools willy nilly thinking they can make me a better artist. But I will buy a tool if I think it will be helpful. (I just snagged a KitchenAid mixer on Craigslist and it sure makes kneading bread easier.) And if I think I can make a tool that will be helpful, even better.
So I decided to make a pottery throwing gauge. I gathered up my nut and bolt collection, and my scrap wood. Aside from some wood screws, the only other material I used was a broken set of pottery calipers from the pottery studio. I sawed these in two, to make two positionable gauges which can be used in tandem to measure the height and width of the pot. They fold up out of the way if they’re not needed. I fastened the gauge parts with bolts, wing nuts and rubber washers like these because they make it easy to tighten the wing nuts and position the gauges. I used bigger bolts, washers and wing nuts to attach the gauges to the center post.
My tool list was short: a drill and bits, an electric screwdriver, a metal saw, a wood saw, a ruler, and a clamp to hold the wood during sawing.
The gauges cover a pretty wide range of sizes. I drilled holes in the main post about four inches apart so the gauges could be taken out and repositioned as needed.
I screwed the main post into a crosspiece which seems steady, but I might have to weight it down with a brick when I am throwing pots on an active wheel. I also drew lines at one-inch intervals let me know how to set the gauges. The center post is about 15 inches high.