Eccentric grinder with a device for changing a grinding motion

摘要

An eccentric grinder is provided with a device for changing a grinding motion. The grinder includes a grinding disc eccentrically positioned on a driving shaft and supporting an internal and an external toothed crowns which are brought to a rolling motion on respective external and internal toothed crowns supported on the housing of the grinder. The toothed crowns supported on the housing are axially displaceable by a handle provided externally of the housing. Three various grinding motions for coarse, medium and fine grinding can be obtained by the drive of the grinder.