The purpose of speed modification gearboxes is to increase or decrease the current speed due to the need for a temporary rotation. The operation in question can be done manually, by motors or drivers, with worm screws. In addition, angular velocity changes are possible. The working principle of these gearboxes is the same as planetary gears, the only difference being that the outer gear is not connected to the body, but is connected to an adjusted screw shaft. They are the perfect solution for speed changes needed at workstations with many variations, such as conveyors or feed lines. Typical uses include paper presses, paper sheet machines, paper reels, packaging machines. It has a very wide range of 3 types, 5 models and 85 structural forms. In addition to standard models, special solutions are produced in line with customer needs.