To learn more about the living history of Mount Jackson, stop by the Mount Jackson Museum, located in Town Center. For stories of the history of our surrounding area, visit the Shenandoah County Historical Society online. An issue of Cooperative Magazine features Mount Jackson.
What is backlash in gear terms? The term backlash is defined as the amount by which a tooth space exceeds the thickness of a gear tooth engaged in mesh. It is necessary to ensure the smooth rotation of meshed gears. The following extract is from the KHK Gear Catalogue* which details the types of backlashes, the relationships between backlashes and the fundamental equations, as well as easy-to-understand illustrations of how it all works.
It may be a real baby tooth or an extra tooth in the set that has grown over the baby tooth and permanent tooth underneath it. This extra tooth will fall out when the baby tooth erupts. But sometimes these teeth -- real or extra -- need to be removed, to avoid the risk of choking if they're loose, for example, so a tooth doesn't get in the way of breastfeeding.