Winding parts of extraction tools (drums, friction wheels, pulleys) are those part of the winding engine by which extraction cable is put to motion together with the extraction vessels. The cable moves along the entire width of the extraction drums’ working area, and when they are at the extreme points the for a maximum angle with the perpendicular line dawn from the axis of the drum shafts. This angle is called cable deviation angle on the winding engine drum. Inclination angles of the cables are inclination angles of the extraction cable cords to the horizontal line. Considering the geometrical and cinematic parameters of an extraction installation with the winding engine positioned on the ground, and having as winding part double cylindrical drum, the paper presents the calculus of the mechanical technological loads transmitted to the tower of an extraction installation. These loads are transmitted to the extraction installation tower from the extraction cables through extraction pulley bearings. In the calculation of these loads, reduction of forces in the extraction cables were used at the periphery of the pulleys in the pullet axis bearings.