Polymer clay bead rollers seem a bit expensive to me. Plus they only make them in one size and a set of shapes. So I thought I could make a quick and simple one for cheap! First off I should make the disclaimer that "I made it at TechShop", so I had a lot of great tools at my disposal. One of the other members in the shop had some clay that he used for a project that had gotten plaster and dirt in it so he was going to throw it out, so I rescued it to make slingshot ammo out of. I'll be writing an instructable on making a slingshot soon!
The basic concept is you have a cylinder sawed in half lengthwise to give you two half cylinders. You put a measured amount of your medium (clay or polymer clay) into the center, rub the two halves together and you get a perfect sphere.
Now you can use these for making polymer clay beads for your jewelry project. You can use these to make perfect little spheres of fish bait, the English call these "Boilies". We in the States just call them dough bait balls. I also used this to make perfect ammo for my slingshot out of clay. It's biodegradable and non-toxic.
I should also mention that I have plans for other ways of making bead/ball rollers so I will be adding to this instructable in the future. One of the issues with this method is that it only does one ball at a time. I want to make a tray so that I can roll multiple balls/beads at once! And I'm working on ways to do just that.
1/2" PVC pipe, you only need a 2-3 foot length of this. This makes beads/balls about 15mm in diameter. You can experiment with other sizes.
Saw, I used a band saw with a thin blade
Sandpaper, I used a belt/disc sander
Clay or Polymer Clay