Stepper motor with a large hollow shaft inside diameter

With a total diameter of 66 mm, it has an extremely large hollow shaft inside diameter of 40 mm. It is only 24 mm flat and weighs just 218 g. The compact drive is easy to assemble and requires little installation space. The rotor with the opening drives the mechanism arranged around the opening directly without any translation. There is no mechanical play that has to be compensated for.