An inertia cone crusher comprising a body resting on a foundation over resilient dampers , an outer cone, and an inner cone arranged inside it on a spherical support , which form a crushing chamber between them connected to the finished product discharge area, with the aid of a slide bushing , an unbalance weight is mounted upon the drive shaft of the inner cone, its center of gravity adjustable in relation to the axis of rotation , the unbalance weight slide bushing is connected to a transmission disk coupling consisting of a driving half-coupling , a driven half-coupling , and a floating disk arranged between them, the transmission disk coupling is connected to a tooth gear and a counterbalance weight , which are in their turn installed upon the counterbalance weight's slide bushing , so that the gear , counterbalance weight , and the counterbalance weight's slide bushing form one moving "dynamic assembly," the "dynamic assembly" is installed on a fixed pivot resting on the flange , and can rotate around the pivot via a journal plain bearing , while the flange is rigidly fixed in the bottom part of the crusher body ; characterized in that the journal plain bearing is arranged between the flange and the counterbalance weight , and consists of a base ring resting on the flange and an upper ring supporting the counterbalance weight's slide bushing and the counterbalance weight itself; the base ring's inner radius being equal to the inner radius of the upper ring, equal to the inner radius of the counterbalanced weight's slide bushing , and equal to or more than the fixed pivot's outer radius; while the flange's top surface has a mating recess to install the base ring. a body resting on a foundation over resilient dampers , an outer cone, and an inner cone arranged inside it on a spherical support , which form a crushing chamber between them connected to the finished product discharge area, with the aid of a slide bushing , an unbalance weight is mounted upon the drive shaft of the inner cone, its center of gravity adjustable in relation to the axis of rotation , the unbalance weight slide bushing is connected to a transmission disk coupling consisting of a driving half-coupling , a driven half-coupling , and a floating disk arranged between them, the transmission disk coupling is connected to a tooth gear and a counterbalance weight , which are in their turn installed upon the counterbalance weight's slide bushing , so that the gear , counterbalance weight , and the counterbalance weight's slide bushing form one moving "dynamic assembly," the "dynamic assembly" is installed on a fixed pivot resting on the flange , and can rotate around the pivot via a journal plain bearing , while the flange is rigidly fixed in the bottom part of the crusher body ; characterized in that the journal plain bearing is arranged between the flange and the counterbalance weight , and consists of a base ring resting on the flange and an upper ring supporting the counterbalance weight's slide bushing and the counterbalance weight itself; the base ring's inner radius being equal to the inner radius of the upper ring, equal to the inner radius of the counterbalanced weight's slide bushing , and equal to or more than the fixed pivot's outer radius; while the flange's top surface has a mating recess to install the base ring. <EOS>