Schneckenuntersetzung

Schneckenuntersetzung, also known as worm gearing or worm reduction, is a mechanical gear system consisting of a screw-like component called a worm and a toothed wheel called a worm wheel. The worm meshes with the teeth of the worm wheel, and rotation of the worm causes the worm wheel to rotate. This arrangement is primarily used to achieve a significant speed reduction in a compact space.

The key characteristic of a Schneckenuntersetzung is its high gear ratio, which is typically achieved in a single stage. This means a single worm and worm wheel can reduce rotational speed by a large factor, often from hundreds to one or even thousands to one. This high reduction ratio is a result of the threading of the worm and the number of teeth on the worm wheel.

Schneckenuntersetzung systems are known for their ability to transmit high torque at low speeds. The meshing of the worm and worm wheel creates a large contact area, which distributes the load effectively. They are also often self-locking, meaning that when the input worm is stationary, the worm wheel cannot drive the worm backward. This property is advantageous in applications where holding a load in position is necessary.

Common applications for Schneckenuntersetzung include lifting mechanisms, conveyor belts, winches, and other machinery requiring high torque and low speed. They are also found in tuning mechanisms for musical instruments and some types of adjustable furniture. The efficiency of a Schneckenuntersetzung can vary depending on the materials used, lubrication, and the specific design, but it is generally lower than other types of gearing due to friction.