Planetary Gearboxes are gearbox types consisting of satellite, sun and internal gears in modular structure, produced to meet the demands of high torque in small volumes, which have become a need in many application areas today. P series gearboxes are flange-mounted gearboxes. It has been introduced to the market with a wide range of products and optional accessories in order to meet the demands from different sectors. Due to their ability to carry high torque in small volumes, they are gear units with high power density and therefore their thermal power needs to be controlled depending on the application they are used in. Planetary gearboxes, which are used extensively especially in mobile applications, are widely used in cranes, metal forming, construction areas, as well as in wind turbines, blade pitch and tower turning, which is one of the renewable energy systems.