Internal cylindrical cams available with single or double roller profile configurations depending on load and dynamic requirements. The double roller solution allows for a significant increase in load capacity and operating speeds compared to the single roller, maintaining contact continuity and kinematic stability even in heavy-duty conditions. In the most common configurations, the stationary cam guides a series of rotating followers at constant or variable speeds, imposing a combined rotary-oscillating motion precisely defined by the profile and the law of motion it realizes. Our production technology allows for small cam diameters relative to the roller size, enabling compact solutions that minimize radial dimensions and simplify the overall machine design.