A worm gear is a combination of a helical gear and a gear drive and consists of a helical worm shaft and a gear. Worm gears are used worldwide in packaging machines, conveyor technology, presses, filling systems and agitators.

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Walls is a technical term used specifically to describe the surfaces of long, cylindrical hollow bodies. It emphasizes the special importance of these surfaces in the design and layout of such shapes.

Wash-down applications refer to appliances and systems that are specially designed for easy and thorough cleaning, especially in hygienically sensitive areas such as the food industry.