As used on Mars

Among the items being displayed by Trident Engineering on Stand 4158 will be RE016, the type of rare earth motor chosen by NASA to power Sojourner, the roving buggy of the Mars Pathfinder.

It is a 16mm, dc motor that generates 3.2W, and is part of the maxon range of rare earth motors that use neodymium as the magnet material. The motors themselves are available in diameters from 10mm to 75mm and in a power range that spans 0.75W to 250W.