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Two more gearboxes of MS074C06 type (in addition to our previously supplied ones in 2018) for alumina mills were manufactured in 2019 by our partner SIEBENHAAR RUSSLAND at their plant in Magdeburg, Germany. These mill drives with a rated power of 736 kW and a weight of about 4000 kg each are integrated into the alumina production line of the RUSAL group. In order to shorten the replacing of old drives with our modern gearboxes and keep the parameters of the new gearbox in line with the new increased production requirements, the design of gearboxes and the coordination of future technical parameters were made in close cooperation with the end user.
The gear calculation was carried out in accordance with DIN 3990 part 11 as per the service factor KA> 2.0 (It was increased compared to the original KA = 0.7. It shows the gearbox's resistance to life loss under overloads). High-performance ball bearings were installed on all shafts; the service life has doubled (> 100,000 hours) compared to the original WECO gearbox (now David Brown Santasalo).
The supplied gearboxes increased the reliability of the mills, - the critical equipment of the alumina refinery.