The article discusses the design and operation of a combined unit’s flat disk, which is installed within the unit. The study focuses on the torques caused by forces acting on the unit’s working parts and the conditions for their balancing. The depth at which the flat disk enters the soil and the required diameter to meet this requirement are also presented. The article includes the results of theoretical and experimental studies to determine the shape and area of the disk segment, where the disk’s diameter must be at least 45 cm and the depth of its penetration into the soil is within 14-15 cm.