Maxon has developed a unique upgrade in the form of a new product series for its standard micro gearhead. In the new GPX planetary gearhead in the UP series, a technical repositioning means that the planetary wheels, which in traditional planetary gearheads are on plain bearings directly on the carrying axle, are now sited above the ball- or needle bearings. If we take a GPX32 UP in three-stage construction as an example, then a maximum efficiency of around 90% can be achieved. Maxon says comparable miniature gearheads achieve around 70%.