SPN Schwaben Präzision presents a 3-stage precision bevel gearbox with media feed-through. Three drive shafts form the gearbox input, which are connected to the respective drive motor during robot assembly. The first gear stages consist of ground and backlash-free adjustable spur gear stages with high requirements for concentricity and uniformity. The kinematics are made up of bevel gears, some of which are arranged one behind the other and designed with special shaft angles. According to the manufacturer, minimal backlash is particularly important: even slight vibrations or synchronization fluctuations lead to irregularities in the application process. The drive with hollow shaft is also tailor-made for the application: In the center of the gearbox, there is a channel 70 cm long for transporting all the media required for the processes. The inner wall surface of the channel is free of steps or edges to prevent the cables and hoses from chafing due to friction.