In 1948 serial production of the first in the USSR ЭШ-1 walking dragline was initiated at NKMZ.
Walking draglines feature the full-revolving electric-operated earth-moving machines fitted with the crank-type walking mechanisms. This design covered by patents is distinguished by reliability and long service life.
Walking draglines are designed to excavate soils of the 1-st to 4-th categories of hardness inclusively when carrying out overburden operations through the use of the vehicle-free technology with the rock being disposed either to the workedout area or on the opencast flank. In so doing soils of the 3-rd and 4-th categories shall be prelimenarily loosened by blasting .
These draglines can be used for operation in opencast collieries, open pits and quarries as well as during construction of canals, irrigation systems and various water-development plants.
Being very reliable in operation, draglines made at NKMZ are employed now to perform about 50% of the earth-moving works in the CIS with their share in the fleet of excavating machines amounting, for instance, up to 80% of the walking draglines in Russia. Today, NKMZ JSC produces reliable, high-duty mobile machines with low soil pressure characteristics which enable to operate them on soft ground.
The following advanced designs provide high performances of the draglines:
Due to the more severe geological and excavation conditions in a number of opencasts and in view of the growing need of the walking draglines with higher reliability, smaller weight and lower power consumption, the type ЭШ-15/90 dragline was designed and made at NKMZ not long ago.
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