The length of the structure is 48 m, and the height is 22 m. It differs from the machines described above in smaller sizes, although for urban indicators it is considered a giant. The ER-1250 bucket wheel excavator is a Soviet-era technique designed for quarrying in open areas for mining. The only analogue of the Bagger 293 is Takraf, working in the city of Hambach (Germany) in a coal mine. There are 20 buckets with a size of 15 m³ installed on the rotor wheel of the machine. In just one day, it is able to dig a huge 10-meter pit the size of a football field. The total weight of all equipment is 14,200 tons. The car got into the Guinness Book of Records because of its size and performance.
The Bagger 293 bucket wheel excavator is a German-made equipment that was built in 1995. A month later, an all-Union record for the extraction of hard coal was set, when instead of the planned 950 thousand tons, 1162 thousand tons of coal were mined. In 1976, the excavator was handed over for technical testing, and in 1978, it was put into operation. It was planned that the productivity of the equipment would be 5000 m³. In 1974, the Bogatyr coal mining enterprise in Kazakhstan began producing the most powerful rotary excavator in those years, ERShRD-5000. Rotary excavator ERShRD-5000, ER-1250 and Bagger 293 General characteristics of bucket wheel excavators: The production of individual parts lasts 5 years, and another 5 years are spent on assembly and testing. Over the past century, about a thousand wheels of various sizes have been created. With smaller tracks, the car would have fallen into the ground. The service life of the machine is 70-80 years.The price of such a mechanism is $100 million.The tallest units are longer than the Statue of Liberty, and their weight is 13.5 thousand tons, 1.5 times heavier than the Eiffel Tower.
For comparison, a huge stadium can be covered with this amount of land. The machine operates around the clock and digs up to 245 thousand m³ per day. The operation of a bucket wheel excavator comes from electricity, which is supplied to the machine through thick cables. Coal is transported by railroad conveyors to power plants, where it is set on fire and electricity is generated. In the process of rotation of the wheel, the buckets pick up the earth and pour it onto large conveyors through which it enters the mines. He does this thanks to a huge wheel with suspended buckets, which is held on an arrow about 60 m long. The mechanism is capable of extracting coal at a depth of hundreds of meters underground. The bucket wheel excavator is a giant machine, the largest combine on the planet, built specifically for mining.
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