Run round circle
alt .: Crooked circle
With this tool, the flat gear of the gears and unrest is checked. It consists of two S-shaped thighs that are opposite and are movable in the middle. The ends of the thighs can be opened to record the wheels and are provided with hollow grains in which the wheels are stored. An invested tour lineal reveals the non -flat -running wheel spots, which are then to be directed.