Face wheel
In machinery, a face wheel, lap, or crown wheel (transmission wheel) is a wheel whose disk face is adapted for grinding and polishing. A water mill contains a face wheel.
In watchmaking, the crown wheel is usually an object of circular shape with contrate teeth, which meshes with the winding pinion and with the ratchet-wheel on the barrel-arbor used to wind-up the watch, respectively, to set the time.
Sources
- G.A. Berner, 4-language Glossary, 1988 re-edition. Courtesy FH, Federation of the Swiss Watch Industry, Bienne, Switzerland.
Links
Source: adapted by the editor from Wikipedia, the free encyclopedia; from the article "Face wheel". Image Credit.
