The Basic and Rotary Device (BRD) is intended for transfer of big axial and radial loads from a rotary platform of not rotary (running) part of the car, and provides rotation of a rotary platform with the working (boom) equipment. OPU is established on road - building cars for hook - on devices. Thanks to the compact design OPU are the effective decision for various service conditions at action of big and average loadings: with one number of balls; with two rows of balls – thinner section; with three rows of rollers – for very high loadings. Advantages: High reliability and stability in work; High kinematic precision; Compactness of production; High statistical and dynamic loadings; Possibility of use of big district speeds; Insignificant sensitivity to temperature drops. Steel: 50G
