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Indexing rotary mechanism is widely used in automatic machines. There are studies of such mechanism kinematics showing its effectiveness. The undertaken strength studies demonstrate the ability of the mechanism to operate under specified loads. Actual tests performed on prototypes exposed inoperativeness of the spherical bearing, namely jamming, under the load. The current work analyzes the failure of the spherical bearing. Factors affecting the jamming are determined as well. Such factors are forces at engagement and the friction forces at spherical surfaces contact. Structural provisions are proposed and considered to solve the issue of jamming and provide the mechanism normal operation.

The article concentrates on the analysis of the current state of settlements at the territory of the Ural region. The Ural region is shown to be an industrial and highly urbanized area. There are some settlements at the territory of the Ural region where the mining complex is the city-forming enterprise, they are mining towns. It has been revealed that the negative environmental impact never vanishes with the termination of mining but causes some new social, economic and ecological problems. With the purpose of reducing the negative impact of mining effect, a number of measures have been proposed aimed to renovate the mining complex facilities which remained after liquidation and to rehabilitate the industrial areas which remained after mineral deposit development termination.

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