Single shaft mixers are produced to have the capacities of 1500 l./1000 l., 3000/2000 l., 4500/3000 l. It is operated by independent twin engine and reducer. One of the most important features of single shaft mixers is that they can continue operating with other engine by reduction of capacity to the half when one of the engines breaks down. This feature is an important advantage for the sites in which concrete is required to be poured uninterruptedly. Having less bed in single shaft mixers means that there will be less problem in terms of bed such as gout leakage or similar problems.