The Simplest Center Finder for Your Workshop

I came up with the simplest possible technique of making a center finder contrivance. The main idea — to use a piece of cardboard with factory-made bend. The bend is for fissure and then double over it.

1. Thick packing cardboard
2. Thin cardboard with bend
3. Office knife
4. Carton glue

Then a pencil or a scriber when use the finished device.

You should make a bisectrix fissure in a cardboard between two boards.

How to apply this device: cap it on a round object and write a line. Then rotate the device on any angle and do second line. Two lines intersects exactly in a geometry center of the circle.