The declared group of inventions belongs to the armor of the lower part of the crushing chamber of the KKD 1500/180 coarse crushing cone crusher and the segment of the armor of the lower part of its crushing bowl, which can be used, in particular, at mining and beneficiation enterprises of ferrous and non-ferrous metallurgy, as well as at diamond mining and mining and chemical enterprises . Armor, the outer working surface of which consists of the lower part of the working surface of the crushing bowl and the lower part of the working surface of the crushing cone, where the surface of the crushing bowl is the inner surface of rotation about the vertical axis, which is the axis of symmetry of the crushing bowl, and the surface of the crushing cone is the outer surface rotation around the axis, which is the axis of symmetry of the crushing cone. The armor is characterized by the fact that the lower edge of the specified working surface of the crushing bowl has a radius in the horizontal plane that is at least 1342 mm, while this surface of the crushing bowl in a vertical section has the form of a curve, which is formed by the combination of the lower and upper arcs that are curved outward , where the lowest point (A2) of the lower arc is located on the above-mentioned lower edge of the working surface of the crushing bowl, and the point of connection (B2) of the indicated arcs is located relative to the lowest point (A2) of the lower arc at a distance of 510 to 550 mm vertically with an upward displacement and from 7 to 47 mm horizontally with an offset towards the axis of symmetry of the crushing bowl, while the lower arc has a radius of 480 to 520 mm, and the highest point (D2) of said upper arc is located relative to the lowest point (A2) of the lower arc at a distance of 1105 to 1145 mm vertically with an upward shift and from 180 to 220 mm horizontally with a shift in the opposite direction from the axis of symmetry of the crushing bowl, while the upper arc has a radius of 2390 to 2430 mm, in addition, the lower edge of the above-mentioned working surface of the crushing cone has a radius in the plane perpendicular to the axis of symmetry of the crushing cone, which has a value of at least 1233 mm, while this surface of the crushing cone in a vertical section has the form of a curve, which is formed by the combination of the lower straight segment, the upper straight segment and the concave arc located between them, where the lowest point (K2) of the specified lower segment is located on the above-mentioned lower edge of the working surface of the crushing cone, and the point of connection (C) of this lower segment and the arc is located relative to the lowest point (K2) of the lower segment at a distance parallel to the axis of symmetry of the crushing cone, which is equal to from 560 to 600 mm with an upward displacement and at a distance perpendicular to the axis of symmetry of the crushing cone, which is equal to from 168 to 208 mm with an offset towards the axis of symmetry of the crushing cone, while the point of connection (F) of the indicated arc and the upper segment is located relative to the lowest point (K2) of the lower segment at a distance parallel to the axis of symmetry of the crushing cone, which is from 1140 to 1180 mm with an upward shift and at a distance perpendicular to the axis of symmetry of the crushing cone, which is from 310 to 350 mm with a shift towards the axis of symmetry of the crushing cone, and the specified arc has a radius from 3980 to 4020 mm, in addition, the specified upper segment is located with an inclination towards the axis of symmetry of the crushing cone. The group of inventions ensures an increase in the wear (abrasion) period of the armor of the lower part of the crushing cone while simultaneously maintaining the wear (abrasion) period of the armor of the lower part of the crushing bowl.